It's tough enough to call the direction on a stock purchase, but when you buy options, not only do you have to be right about the direction of the move, you also have to be right about the timing, writes Brian Overby of TradeKing.

In this article, I've analyzed ten of the most common option trading mistakes. Options are by nature a more complex investment than simply buying and selling stocks. For example, when you buy options, not only do you have to be right about the direction of the move, you also have to be right about the timing.

Option trading is not something you want to do if you just fell off the turnip truck. But when used properly, options allow investors to gain better control over the risks and rewards depending on their forecast for the stock. No matter if your forecast is bullish, bearish, or neutral there's an option strategy that can be profitable if your outlook is correct.

Mistake 1: Starting Out by Buying Out-of-the-Money (OTM) Call Options
It seems like a good place to start: buy a call option and see if you can pick a winner. Buying calls may feel safe because it matches the pattern you're used to following as an equity trader: buy low, sell high. Many veteran equities traders began and learned to profit in the same way.

However, buying OTM calls outright is one of the hardest ways to make money consistently in the options world. If you limit yourself to this strategy, you may find yourself losing money consistently and not learning very much in the process. Consider jump-starting your options education by learning a few other strategies, and improve your potential to earn solid returns as you build your knowledge.

What's Wrong with Just Buying Calls?
It's tough enough to call the direction on a stock purchase. When you buy options, however, not only do you have to be right about the direction of the move, you also have to be right about the timing. If you're wrong about either, your trade may result in a total loss of the option premium paid.

Each day that passes when the underlying stock doesn't move, your option is like an ice cube sitting in the sun. Just like the puddle that's growing, your option's time value is evaporating until expiration. This is especially true if your first purchase is a near-term, way out-of-the-money option (a popular choice with new options traders because they're usually quite cheap).

Not surprisingly, though, these options are cheap for a reason. When you buy an OTM "cheap" option, they don't automatically increase just because the stock moves in the right direction. The price is relative to the probability of the stock actually reaching (and going beyond) the strike price. If the move is close to expiration and it's not enough to reach the strike, the probability of the stock continuing the move in the now shortened timeframe is low. Therefore, the price of the option will reflect that probability.

How Can You Trade More Informed?
As your first foray into options, you should consider selling an OTM call on a stock that you already own. This strategy is known as a "covered call." By selling the call, you take on the obligation to sell your stock at the strike price stated in the option. If the strike price is higher than the stock's current market price, all you're saying is: if the stock goes up to the strike price, it's okay if the call buyer takes, or "calls," that stock away from me.

NEXT PAGE: Use the Right Strategy for the Right Market

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For taking on this obligation, you earn cash from the sale of your OTM call. This strategy can earn you some income on stocks when you're bullish, but you wouldn't mind selling the stock if the price goes up prior to expiration.

What's nice about covered call selling, or "writing," as a starter strategy is that the risk does not come from selling the option. The risk is actually in owning the stock-and that risk can be substantial. The maximum potential loss is the cost basis of the stock less the premium received for the call. (Don't forget to factor in commissions, too.)

Although selling the call option does not produce capital risk, it does limit your upside, therefore creating opportunity risk. In other words, you do risk having to sell the stock upon assignment if the market rises and your call is exercised. But since you own the stock (in other words you are "covered"), that's usually a profitable scenario for you because the stock price has increased to the strike price of the call.

If the market remains flat, you collect the premium for selling the call and retain your long stock position. On the other hand, if the stock goes down and you want out, just buy back the option, closing out the short position, and sell the stock to close the long position. Keep in mind you may have a loss in the stock when the position is closed.

As an alternative to buying calls, selling covered calls is considered a smart, relatively low-risk strategy to earn income and familiarize yourself with the dynamics of the options market. Selling covered calls enables you to watch the option closely and see how its price reacts to small moves in the stock and how the price decays over time.

Mistake 2: Using an "All-Purpose" Strategy in All Market Conditions
Option trading is remarkably flexible. It can enable you to trade effectively in all kinds of market conditions. But you can only take advantage of this flexibility if you stay open to learning new strategies.

Buying spreads offers a great way to capitalize on different market conditions. When you buy a spread it is also known as a "long spread" position. [BigTrends.com Editor's Note- we prefer to call these "debit spreads" and/or "credit spreads," depending on whether you are paying out or receiving cash.] All new options traders should familiarize themselves with the possibilities of spreads, so you can begin to recognize the right conditions to use them.

How Can You Trade More Informed?
A long spread is a position made up of two options: the higher-cost option is bought and the lower-cost option is sold.  These options are very similar-same underlying security, same expiration date, same number of contracts and same type (both puts or both calls). The two options differ only in their strike price. Long spreads consisting of calls are a bullish position and are known as "long call spreads." Long spreads consisting of puts are a bearish position and are known as "long put spreads."

With a spread trade, since you bought one option at the same time you sold another, time decay that could hurt one leg may actually help the other. That means the net effect of time decay is somewhat neutralized when you trade spreads, versus buying individual options.

NEXT PAGE: Have a Definite Exit Plan

The downside to spreads is that your upside potential is limited. Frankly, only a handful of call buyers actually make sky-high profits on their trades. Most of the time, if the stock hits a certain price, they sell the option anyway. So why not set the sell target when you enter the trade? An example would be to buy the 50-strike call and sell the 55-strike call. That gives you the right to buy the stock at $50, but also obligates you to sell the stock at $55 if the stock trades above that price at expiration.

Even though the maximum potential gain is limited, so is the maximum potential loss. The maximum risk for the 50- 55 long call spread is the amount paid for the 50-strike call, less the amount received for the 55-strike call.

Call Debit Spread Example

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There are two caveats to keep in mind with spread trading. First, because these strategies involve multiple option trades, they incur multiple commissions. Make sure your profit and loss calculations include all commissions as well as other factors like the bid/ask spread. Second, as with any new strategy, you need to know your risks before committing any capital.

Mistake 3: Not Having a Definite Exit Plan Prior to Expiration
You've heard it a million times before. In trading options, just like stocks, it's critical to control your emotions. This doesn't mean swallowing your every fear in a super-human way. It's much simpler than that: have a plan to work, and work your plan.

Planning your exit isn't just about minimizing loss on the downside. You should have an exit plan, period-even when things are going your way. You need to choose in advance your upside exit point and your downside exit point, as well as your timeframes for each exit.

What If You Get Out Too Early and Leave Some Upside on the Table?
This is the classic trader's worry. Here's the best counterargument I can think of: What if you make a profit more consistently, reduce your incidence of losses, and sleep better at night? Trading with a plan helps you establish more successful patterns of trading and keeps your worries more in check.

How Can you Trade More Informed?
Whether you are buying or selling options, an exit plan is a must. Determine in advance what gains you will be satisfied with on the upside. Also determine the worst-case scenario you are willing to tolerate on the downside. If you reach your upside goals, clear your position and take your profits. Don't get greedy. If you reach your downside stop-loss, once again you should clear your position. Don't expose yourself to further risk by gambling that the option price might come back.

The temptation to violate this advice will probably be strong from time to time. Don't do it. You must make your plan and then stick with it. Far too many traders set up a plan and then, as soon as the trade is placed, toss the plan to follow their emotions.

Mistake 4: Compromising Your Risk Tolerance to Make up for Past Losses by "Doubling Up"
I've heard many option traders say they would never do something: ".never buy really out-of-the-money options!", ".never sell in-the-money options!" It's funny how these absolutes seem silly-until you find yourself in a trade that's moved against you.

All seasoned options traders have been there. Facing this scenario, you're often tempted to break all kinds of personal rules, simply to keep on trading the same option you started with. Wouldn't it be nicer if the entire market was wrong, not you?

NEXT PAGE: Trading Illiquid Options

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As a stock trader, you've probably heard a similar justification for "doubling up to catch up." if you liked the stock at 80 when you bought it, you've got to love it at 50. It can be tempting to buy more and lower the net cost basis on the trade.

Be wary, though: What makes sense for stocks might not fly in the options world.

How Can you Trade More Informed?
"Doubling up" as an options strategy usually just doesn't make sense. Options are derivatives, which means their prices don't move the same or even have the same properties as the underlying stock. Time decay, whether good or bad for the position, always needs to be factored into your plans.

When things change in your trade and you're contemplating the previously unthinkable, just step back and ask yourself: "Is this a move I'd have taken when I first opened this position?" If the answer is no, then don't do it.

Close the trade, cut your losses, or find a different opportunity that makes sense now. Options offer great possibilities for leverage on relatively low capital, but they can blow up just as quickly as any position if you dig yourself deeper. Take a small loss when it offers you a chance of avoiding a catastrophe later.

Mistake 5: Trading Illiquid Options
Simply put, liquidity is all about how quickly a trader can buy or sell something without causing a significant price movement. A liquid market is one with ready, active buyers and sellers at all times.

Here's another, more mathematically elegant way to think about it: Liquidity refers to the probability that the next trade will be executed at a price equal to the last one.

Stock markets are generally more liquid than their related options markets for a simple reason: Stock traders are all trading just one stock, but the option traders may have dozens of option contracts to choose from. Stock traders will flock to just one form of IBM stock, for example, but options traders for IBM have perhaps six different expirations and a plethora of strike prices to choose from. More choices by definition means the options market will probably not be as liquid as the stock market.

Of course, IBM is usually not a liquidity problem for stock or options traders. The problem creeps in with smaller stocks. Take SuperGreenTechnologies, an (imaginary) environmentally friendly energy company with some promise, but with a stock that trades once a week by appointment only.

If the stock is this illiquid, the options on SuperGreenTechnologies will likely be even more inactive. This will usually cause the spread between the bid and ask price for the options to get artificially wide. For example, if the bid-ask spread is $0.20 (bid=$1.80, ask=$2.00), if you buy the $2.00 contract that's a full 10% of the price paid to establish the position.

It's never a good idea to establish your position at a 10% loss right off the bat, just by choosing an illiquid option with a wide bid-ask spread.

NEXT PAGE: Factor Earnings or Dividend Payment into Your Strategy

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How Can you Trade More Informed?
Trading illiquid options drives up the cost of doing business, and option trading costs are already higher, on a percentage basis, than for stocks. Don't burden yourself.

Here's a popular rule-of-thumb: If you are trading options, make sure the open interest is at least equal to 40 times the number of contacts you want to trade. For example, to trade a 10-lot,  your acceptable liquidity should be 10 x 40, or an open interest of at least 400 contracts. ("Open interest" is the number of outstanding option contracts of a particular strike price and expiration date that have been bought or sold to open a position. Any opening transactions increase open interest, while closing transactions decrease it. Open interest is calculated at the end of each business day.)

Trade liquid options and save yourself added cost and stress. There are plenty of liquid opportunities out there.

Mistake 6: Waiting Too Long to Buy Back Your Short Options
This mistake can be boiled down to one piece of advice: Always be ready and willing to buy back short options early.

Far too often, traders will wait too long to buy back the options they've sold. There are a million reasons why: You don't want to pay the commission; you're betting the contract will expire worthless; you're hoping to eke just a little more profit out of the trade.

How Can you Trade More Informed?
If your short option gets way out-of-the-money and you can buy it back to take the risk off the table profitably, then do it.

Don't be cheap.

For example, what if you sold a $1.00 option and it's now worth 20 cents? You wouldn't sell a 20-cent option to begin with, because it just wouldn't be worth it. Similarly, you shouldn't think it's worth it to squeeze the last few cents out of this trade.

Here's a good rule of thumb: if you can keep 80% or more of your initial gain from the sale of the option, you should consider buying it back immediately. Otherwise, it's a virtual certainty: one of these days, a short option will bite you back because you waited too long.

Mistake 7: Failing to Factor Earnings or Dividend Payment Dates into Your Options Strategy
It pays to keep track of earnings and dividends dates for your underlying stock. For example, if you've sold calls and there's a dividend approaching, it increases the probability you may be assigned early. This is especially true if the dividend is expected to be large. That's because option owners have no rights to a dividend. In order to collect it, the option trader has to exercise the option and buy the underlying stock.

As you'll see in Mistake 8, early assignment is a random, hard-to-control threat for all options traders. Impending dividends are one of the few factors you can identify and avoid to reduce your chances of being assigned.

Earnings season usually makes options contracts pricier, for both puts and calls. Again, think of it in real-world terms. Options can work like protection contracts; they can be used to hedge the risk on other positions. For example, if you live in Florida, when will it be most expensive to buy homeowner's insurance? Definitely when the weatherman predicts a hurricane is coming your way.

The same principle is at work with options trading during earnings season. Pending news can produce volatility in a stock's price-like a brewing hurricane headed straight for your house. If you want to trade specifically during earnings season, that's fine. Just go in with an awareness of the added volatility and likely increased options premiums. If you'd rather steer clear, it might be wiser to trade options after the effects of an earnings announcement have already been absorbed into the market.

NEXT PAGE: Leg into Spread Trades

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How Can you Trade More Informed?
Steer clear of selling options contracts with pending dividends, unless you're willing to accept a higher risk of assignment. You must know the ex-dividend date. Trading during earnings season means you'll encounter higher volatility with the underlying stock-and usually pay an inflated price for the option. If you're planning to buy an option during earnings season, one alternative is to buy one option and sell another, creating a spread (see Mistake 2 for more information on spreads).

If you're buying an option that's inflated in price, at least the option you're selling is likely to be inflated as well.

Mistake 8: Not Knowing What to Do if You're Assigned Early
First things first: If you sell options, just remind yourself occasionally that you can be assigned. Lots of new options traders never think about assignment as a possibility until it actually happens to them. It can be jarring if you haven't factored in assignment, especially if you're running a multi-leg strategy like long or short spreads.

For example, what if you're running a long call spread and the higher-strike short option is assigned? Beginning traders might panic and exercise the lower-strike long option in order to deliver the stock. But that's probably not the best decision. It's usually better to sell the long option on the open market, capture the remaining time premium along with the option's inherent value, and use the proceeds toward purchasing the stock. Then you can deliver the stock to the option holder at the higher strike price.

Early assignment is one of those truly emotional, often irrational market events. There's often no rhyme or reason to when it happens. It sometimes just happens, even when the marketplace is signaling that it's a less-than-brilliant maneuver. It usually only makes sense to exercise your call early if a dividend is pending. But it's trickier than that, because human beings don't always behave rationally.

How Can you Trade More Informed?
The best defense against early assignment is simply to factor it into your thinking early. Otherwise it can cause you to make defensive, in-the-moment decisions that are less than logical.

Sometimes it helps to consider market psychology. For example, which is more sensible to exercise early: a put or a call?

Exercising a put, or a right to sell stock, means the trader will sell the stock and get cash. The question is always, "Do you want your cash now or at expiration?" Sometimes, people will want cash now versus cash later. That means puts are usually more susceptible to early exercise than calls, unless the stock is paying a dividend.

Exercising a call means the trader has to be willing to spend cash now to buy the stock, versus later in the game. Usually it's human nature to wait and spend that cash later. However, if a stock is rising less skilled traders might pull the trigger early, failing to realize they're leaving some time premium on the table. That's why early assignment can be unpredictable.

Mistake 9: Legging into Spread Trades
Don't "leg in" if you want to trade a spread. If you buy a call, for example, and then try to time the sale of another call, hoping to squeeze a little higher price out of the second leg, oftentimes, the market will downtick and you won't be able to pull off your spread.

Now you're stuck with a long call and no strategy to act upon.

Sound familiar? Most experienced options traders have been burned by this scenario, too, and learned the hard way. Trade a spread as a single trade.  Don't take on extra market risk needlessly.

NEXT PAGE: Use Index Options [and ETFs] for Neutral Trades

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How Can you Trade More Informed?
Use a trading platform with a spread trading screen to be sure both legs of your trade are sent to market simultaneously. Set up to not execute your spread unless it can achieve the net debit or credit you're looking to establish. It's a smarter way to execute your strategy and avoid extra risk.

Spread Trade Example

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Mistake 10: Failing to Use Index Options [and ETFs] for Neutral Trades
Individual stocks can be quite volatile. For example, if there is major unforeseen news in one particular company, it might well rock the stock for a few days. On the other hand, even serious turmoil in a major company that's part of the S&P 500 probably wouldn't cause that index to fluctuate very much.

What's the moral of the story? Trading options that are based on indices can partially shield you from the huge moves that single news items can create for individual stocks. Consider neutral trades on big indices, and you can minimize the uncertain impact of market news.

How Can you Trade More Informed?
Consider trading strategies that will be profitable if the market stays still, such as short spreads (also called "credit spreads") on indices. Sudden stock moves based on news tend to be quick and dramatic, = and often the stock will then trade at a new plateau for a while. Index moves are different: less dramatic, and less likely impacted by a single development in the media.

Like a long spread, a short spread is also made up of two positions with different strike prices. But in this case the more expensive option is sold and the cheaper option is bought. Again, both legs have the same underlying security, same expiration date, same number of contracts and both are either both puts or both calls. The effects of time decay are somewhat reduced since one option is bought while the other is sold.

A key difference between long spreads and short spreads is short spreads are traditionally constructed to not only be profitable relative to direction, but even when the underlying remains the same. So short call spreads are neutral to bearish and short put spreads are neutral to bullish.

An example of a put credit spread used with an index would be to sell the 100-strike put and buy the 95-strike put when the index is around 110. If the index remains the same or increases, both options would remain out-of-the-money (OTM) and expire worthless. This would result in the maximum profit for the trade, limited to the credit remaining after selling and buying each strike. In this case, let's estimate that credit to be $2 per contract. The maximum potential loss is also limited; it's the difference between the strikes less the credit received for the spread. So the potential risk nets out to $3 per contract (100 - 95 - $2).

Lastly, remember spreads involve more than one option trade, and therefore incur more than one commission. Bear this in mind when making your trading decisions.

By Brian Overby, Senior Option Analyst, TradeKing