Your contract lost 30 percent and your level never broke

The premium moves for reasons that have nothing to do with your idea. Implied volatility drops or the spread widens, and the quote falls while the stock sits still.

So a 30 percent drop in the contract can happen on a five cent move against you. Your support at 98 is untouched. You are out anyway, and the trade you planned runs without you.

The number also depends on what you paid for it. Buy the same contract fifteen minutes later and your 30 percent sits somewhere else on the chart. Two traders in one setup get stopped at two different prices.

The rule feels safe because it caps the damage in dollars. What it really does is hand your exit to whoever is quoting the option.

Your stop is a price on the underlying, decided before you enter. Pick the level that has to break for the idea to be dead, then let a candle close decide.

Work an example. Stock at 100, support at 98, next resistance at 104. You buy calls because price held 98 and turned up.

Your stop is a close below 98 on the timeframe you entered on. Your target is 104. Risk two points, reward four, and the chart fixed that ratio before you bought anything.

A wick to 97.80 that closes back at 98.30 has not stopped you out. The premium will have dropped hard on that wick. Nothing in the drop says the level failed, so you sit still and let the candle finish.

If a two point move against you wipes the contract, the contract is wrong. Cheap out of the money strikes are almost all time value, so they bleed fast on small moves.

A strike at or inside the money tracks the stock more closely and carries intrinsic value. It costs more and it exits easier, because other traders want it.

Buy the strike your structure points at. Then size the position so a stop at 98 costs you what you planned to risk, and no more.

If that number is too big for the day, take fewer contracts. Take none if a single contract is still too much. Widening the stop to make the position fit is the wrong repair. The stop is a place on the chart.

Decay charges rent while nothing happens. On a same day expiry, if there is no break by the fifth candle of your entry timeframe, get out.

That is a time stop, and it still reads the chart. Five candles of nothing on a five minute entry means the setup never fired. You are paying to watch.

With a week or more to expiry the instruction flips. You can sit through the chop and let the level do its work, because you paid for that patience.

So the honest version of the rule is about how much time you bought. Decide it before you enter and write it into the plan. A trade with both exits already defined is a trade you can leave alone.

Write the reason at the moment you close, in three words or fewer. Closed below level. Time stop. Premium panic.

After twenty trades the tags do the arguing for you. If the premium panic exits are your losers, that is your own data telling you to stop. Each tag costs five seconds, and it is the only honest record of why you got out.

Add one more column: what price did afterwards. A trade you cut at 30 percent that later reached your target goes in it. That is the one to read twice.

The pattern shows up faster than you expect. Three of those in a month should change how you place the order. That is the only reason to write any of it down.

This takes under a minute once the level is on the chart. If you cannot fill in every line, you do not have a trade yet.