A losing trade and the trade that gets you back to even are not mirror images of each other, even though they feel like they should be. Lose 10% and you need roughly 11% back. Lose 50% and you need 100% back — not 50%, not 60%, a full double. The deeper the drawdown, the worse this asymmetry gets, and it gets worse at an accelerating rate, not a steady one. This is arithmetic, not a mood or a warning sign to feel bad about, and it's worth running before you decide how much to risk on any single trade — not after a drawdown has already made you learn it the hard way.
The math: what a loss actually costs you to undo
The reason a loss and its recovery aren't symmetrical is that they're measured against different numbers. A loss is a percentage of what you started with. The gain that undoes it is a percentage of what's left — a smaller base, which means the same dollars back register as a bigger percentage gain. Drop $10,000 to $9,000 and you've lost 10%. Getting back to $10,000 from $9,000 is an 11.1% gain, because you're now compounding from the smaller pile. The formula is simple: gain needed equals the loss divided by one minus the loss. Run a few numbers through it and the gap opens up fast.
The gain required to undo a loss, by depth of loss
Notice the gap isn't constant, and it isn't even linear. Going from -10% to -25% roughly triples the gain required. Going from -50% to -75% takes the requirement from 100% to 300% — a jump of 200 percentage points for 25 more points of loss. That's the part worth sitting with before the next section, because it means every additional percent of drawdown costs more to undo than the one before it.
The curve bends, it doesn't climb at a steady rate
Plot the gain needed against the size of the loss and the line isn't straight. It curves gently at first and then sharply, because the formula divides by what's left, and what's left keeps shrinking toward zero as the loss approaches 100%.
Below -50% is where the curve stops looking like a steep hill and starts looking like a wall. At -80% you need a 400% gain. At -90% you need 900%. At -99% you'd need a 9,900% gain just to get back to where you started — not because the math is exotic, but because there's almost nothing left to compound from. The lesson isn't that deep drawdowns are rare; after a bad sequence they aren't. It's that the cost of letting one get deep rises faster than the drawdown itself does.
Position size decides how fast you dig the hole, not how far you climb back out
Here's the part that connects this directly to how much you risk per trade: position size doesn't change the recovery math at all. A -50% drawdown needs a 100% gain back whether it took three catastrophic trades or three hundred small ones. What position size changes is how fast you can get there.
Risk per trade changes the speed into a hole, not the climb back out
| Risk per trade | Losing trades to -20% | Losing trades to -50% | Gain needed to recover -50% |
|---|---|---|---|
| 1% per trade | ~23 | ~69 | 100% |
| 2% per trade | ~12 | ~35 | 100% |
| 5% per trade | ~5 | ~14 | 100% |
| 10% per trade | ~3 | ~7 | 100% |
The number that should actually worry you isn't the 100% in the last column — it's constant no matter what you do, so there's nothing to manage there. It's the middle columns. At 1% risk per trade, a string of bad luck needs to run for roughly 70 trades straight to put you 50% underwater. At 10% risk per trade, the same hole opens up in about a week of trading. Risk per trade is the one lever in this whole picture you actually control, and it's a lever on speed, not on how harsh the eventual bill is.
The trap: sizing up to catch up
The dangerous reaction to being in a drawdown is reaching for more size to make it back faster — exactly when the recovery math says you can least afford a second hit to the same account. A bigger position doesn't make the required gain smaller. It just means the next loss, if it comes, lands on a balance that's already diminished and pushes you further along a curve that was getting steeper with every point you'd already lost.
The pull toward sizing up after a loss doesn't feel like doubling down. It feels like fixing a mistake efficiently. That's the same instinct behind overtrading after a losing stretch: trades taken to resolve a feeling about the account rather than because the setup in front of you earned that size. The feeling is real. The math underneath it doesn't care how it feels.
Before you try to make it back
Before you size up to 'make it back'
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You've calculated the actual gain needed to recover your current drawdown — Not a rough feeling — the real number from loss ÷ (1 − loss). Most traders are surprised by how much higher it is than the loss itself.
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Your risk per trade on the way out is the same as, or smaller than, it was on the way in — The recovery gain doesn't shrink because you're in a hurry to leave the hole — it stays exactly as large no matter what size you trade.
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You know how many consecutive losses at your current size would double your drawdown from here — If that number is small, the current size is setting up a much steeper recovery than the one you're already facing.
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You're increasing size because the loss needs to be 'made back' on a certain timeline — A deadline on the recovery is a reason to trade differently, not a reason the math changes — this is usually the moment size creeps up right before a drawdown gets materially worse.
None of this is an argument against trading through a drawdown — most strategies spend real time underwater and recover on their own schedule. It's an argument for running the actual number before deciding how to behave inside one. If you're down 30%, the honest figure is a 42.9% gain back, not "a good month." Knowing that number changes what a good month needs to look like, and it's a far better planning input than whatever the drawdown happens to feel like today.
