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A trailing max loss that follows floating profit: how closing early can cost you buffer

Here's a $50,000 account with a trailing max loss of 6%, which is $3,000. The floor starts at $47,000 and follows the highest equity reached. Some firms trail on equity including open trades, others only on closed balance, so check which applies to you. This example assumes the equity version.

You open a trade and the floating profit reaches $900. Equity is $50,900, so the floor moves to $47,900. Price pulls back and you close at +$100. Balance is $50,100, and the floor stays at $47,900, because floors only move up.

Your buffer is now $50,100 minus $47,900, which is $2,200. If you hadn't traded at all it would have been $3,000. The trade made $100 and cost you $800 of buffer, permanently.

The mechanism: the floating peak lifted the floor by $900, and you kept only $100 of it. The difference between the peak and the exit is gone from your cushion. Every trade that makes a new equity high and then gives some back does a small version of this.

At a 0.25% scalping risk of $125 per trade, a buffer of $2,200 is 17.6 losses against 24 at $3,000. That matters over a long run of trades.

This is the nastiest feature of equity trailing. A floating profit you never banked still raises the floor. For scalpers who let winners run then give some back, the floor ratchets up quickly. One defence is to take partials earlier, so more of the peak is actually banked. Another is to pick a firm that trails only on closed balance, or one where the trailing stops once the floor reaches the starting balance.

Compare with a different exit. Suppose the same trade is held to +$900 and closed there. Balance $50,900, floor $47,900, buffer $3,000. So the full cushion survives only if you close at the peak, which nobody can do on purpose. The more of the profit you give back before closing, the more buffer you lose. This is why, under trailing rules based on equity, a trade that reaches 1R in profit and then reverses to a scratch isn't neutral. It raised the floor by 1R in dollars and gave you nothing for it, a cost the closed trade log doesn't show.

Put the loss in units of risk. On the $50,000 account at 1% risk, one loss is $500. A $3,000 buffer holds 6 losers. A $2,200 buffer holds 4.4. So giving back $800 of floating profit in one trade took away about 1.6 trades of cushion. For a system that takes several trades a day, a few such reversals in a week can cut the number of losers you can survive in half, even though the closed trades show a small profit. It makes the case for taking partial profits earlier on those accounts, though the exact trade off depends on the strategy.

Some firms stop the trail once the floor reaches the starting balance. On a $50,000 account with a 6% trail, that would happen once equity reaches $53,000, when the floor reaches $50,000 and stays. After that the account has the same shape as a static one with a floor at breakeven. Whether this lock exists changes the whole plan. If it does, the first $3,000 of profit is the dangerous part and everything after is safer. If it doesn't, the floor keeps following you up indefinitely. Look for the words "stops trailing", "locks" or "initial balance" in the rules.

One question with numbers settles it, and a written reply is something to keep. Ask support: if my floating profit reaches $900 and I close the trade at +$100, what is my drawdown floor afterwards? Reading the rules page for the words equity, balance and closed also helps, but rules pages are often vague about floating profit. A reply that says the floor is based on closed balance tells you the example above doesn't apply. A reply that says equity tells you it does. Either way, the answer beats guessing, and you only have to ask once.