Drawdown and recovery: why losses are harder to win back

A drawdown is the fall in your balance from its highest point to a later low. It is the number that tells you how much pain your trading has caused so far, and it has one property that surprises almost everyone: losses and gains are not symmetrical. Lose 50% and you need to double what remains just to get back to where you started. Understanding that asymmetry is the strongest argument for keeping each loss small.

Measuring a drawdown

A drawdown is always measured from a peak, not from your deposit.

Drawdown = (peak − trough) / peak

Worked example: you start with $1,000, grow it to $1,200, then fall to $900. The drawdown is (1,200 − 900) / 1,200 = 25%. You are only 10% below your starting balance, but 25% below your best point, and the 25% is what you have to climb back to make new highs.

The recovery table

If you lose a fraction d of your balance, the gain needed to get back is d / (1 − d).

Small drawdowns are almost symmetrical: lose 5%, gain 5.3%. Large ones are a trap: past about −30%, the required recovery grows faster than the loss. The reason is plain arithmetic: after a loss you are trying to earn back the same dollars with a smaller balance.

On fixed-payout trades, there is an extra layer. Every winning trade earns less than a losing trade costs, so even a trader with a genuine edge recovers slowly. With a negative expected value, recovery from a deep drawdown is, on average, not something the maths supports at all.

Losing streaks are normal

The cause of most drawdowns is not one disaster but an ordinary streak. In a 50/50 process, the longest losing streak you can expect over a few hundred trades is roughly seven or eight in a row. That is not bad luck; it is what randomness looks like.

What a streak does to you depends on your stake size:

At 1–2%, eight straight losses are a bad afternoon. At 10%, the same perfectly ordinary streak leaves you needing to more than double the balance. That is why risk per trade is the main tool against deep drawdowns, and why raising stakes after losses, as in martingale, is the fastest way into one.

Reading your equity curve

An equity curve is your balance plotted after each trade. You can build one from your trade history or trading journal in any spreadsheet: trade number on the horizontal axis, balance after the trade on the vertical.

What to look for:

• Overall slope. Up, flat or down over at least 100 trades. Anything shorter is mostly noise.
• Depth of the dips. The largest peak-to-trough fall is your maximum drawdown. Ask honestly whether you could live through one twice as deep.
• Shape of the dips. Gradual declines usually mean a method that does not work. Sudden cliffs usually mean broken rules: oversized stakes, revenge trades, a session that ran too long.
• Behaviour after dips. If trades get larger or more frequent after a fall, your curve is telling you about psychology, not strategy.

A flat or gently falling curve with small dips is also information. At payouts below 100%, a method with no edge produces exactly that: a slow slide with occasional rallies that look like progress.

Risk of ruin, intuitively

Risk of ruin is the probability that your balance falls to a level where you can no longer trade, or to a loss you have decided you will not go beyond. You do not need the formulas to grasp the intuition:

1. Bigger stakes, higher risk of ruin. If each trade is 20% of the balance, a handful of ordinary losses ends the account. At 1%, it takes a very long streak.
2. Negative expectancy, eventual ruin. If the average trade loses money, then given enough trades the balance drifts down whatever the stake size. Small stakes only make it take longer.
3. Positive expectancy is not immunity. Even with a real edge, oversized stakes can ruin you before the edge has time to show.

A practical version is to define your own ruin point in advance, for example "if this account falls 30% from its peak, I stop trading it and review everything", and treat it as a hard rule.

Turning this into rules

• Keep risk per trade small enough that an eight-loss streak costs less than about 20%.
• Set a daily loss limit and a maximum drawdown at which you stop and review.
• Track your equity curve weekly, not after each trade.
• Never increase stake size to "get back to the peak".