TL;DRThe peak-to-trough decline in your account equity. Drawdown is the number that ends trading careers, triggers prop firm violations, and determines whether your strategy is survivable.
Drawdown measures how far your account has fallen from its highest point. If your account peaks at $50,000 and drops to $45,000, you're in a $5,000 drawdown, or 10%.
The key concept is that drawdown is measured from the peak, not from your starting balance. If you grow your account from $50,000 to $60,000 and then fall to $55,000, your drawdown is $5,000 from the $60,000 peak, even though you're still up from where you started.
Maximum drawdown is the largest peak-to-trough drop in your account history. This is the single most important number for evaluating a trading strategy because it tells you the worst-case scenario you need to survive.
Daily drawdown is the maximum loss allowed in a single trading day. Prop firms use this as a hard limit.
Trailing drawdown follows your account equity upward but never moves down. If your trailing drawdown is $3,000 and your account reaches $53,000, the liquidation level moves up to $50,000. It never drops back down.
Drawdown recovery is not symmetrical. A 10% loss requires an 11.1% gain to get back to even. A 20% loss requires 25%. A 50% loss requires 100%, meaning you need to double your remaining capital just to break even.
This is why small drawdowns are manageable and large ones are career-ending. A trader who limits drawdowns to 5-10% can recover in a few good trading days. A trader who lets drawdown reach 30-40% may never recover because the math works against them.
Every prop firm sets drawdown limits as the primary risk control. Static drawdown means your liquidation level is fixed from the start. Trailing drawdown means the liquidation level follows your account's high-water mark.
Many traders pass the profit target but lose the account because the trailing drawdown caught up to them. Understanding which type your firm uses is essential before you start trading.
The best way to manage drawdown is to prevent it from getting large in the first place. Set a daily loss limit and stop trading when you hit it. Most professional traders use a daily limit of 1-2% of their account.
Reduce position size during drawdowns. If you are down 5% from your peak, cut your contract size in half. This slows the bleeding and gives you room to recover without taking outsized risk.
Trailing drawdown trap
You start a prop firm evaluation with $50,000. Trailing drawdown is $2,500. You make $2,000 on day one, bringing your account to $52,000.
Your liquidation level is now $49,500 ($52,000 minus $2,500). On day two, you lose $2,600. Your equity drops to $49,400, which is below the $49,500 trailing drawdown level. Your account is closed, even though you are only down $600 from your starting balance.
Recovery math in action
Your $25,000 account drops to $20,000 after a bad week. That is a 20% drawdown.
To get back to $25,000, you need a 25% return on your remaining $20,000. If you average $500 per day in profits, that is 10 trading days just to get back to where you started.
Increasing position size to recover from drawdown faster
This is the most common way traders blow up. Reduce size during drawdowns. Smaller positions give you more room to recover.
Not understanding trailing drawdown before starting an evaluation
Read the prop firm rules carefully. Know whether the drawdown is static or trailing, and whether it is calculated on closed trades only or on unrealized equity.
Only checking drawdown at the end of the day
Prop firms track intraday equity. A position that is down $3,000 at 11 AM but recovers by 4 PM still triggered the drawdown limit at 11 AM.