Trading term

What is Equity curve?

An equity curve plots the running total of an account or a strategy over time, updated after every single trade it takes. Its shape — the slope, the smoothness, the depth of its dips — says more about a system than the final number does.

Plot cumulative profit after every trade and you get a line. That line is the most honest summary of a strategy that exists, because it shows the order things happened in. Two systems can finish at exactly the same profit while one climbed steadily and the other spent months underwater first, and only the curve reveals the difference.

Three things are worth reading off it. The slope is the edge — how fast equity accumulates. The smoothness is the consistency, which determines whether the strategy is psychologically survivable. And the drawdowns, the distance from each peak to the following trough, are what actually gets traders to quit: a system with a 30% maximum drawdown will be abandoned by most people who trade it, however good the endpoint.

A useful discipline is to look at the curve with the final value covered up. If the path would have made you stop trading, the endpoint is irrelevant — you would never have reached it.

The path, not just the endpoint
CUMULATIVE R →0−3R drawdown+6R30 trades · 0.20R per trade · worst drawdown 3RCover the endpoint. If the PATH would have made you quit, the endpoint was never reachable.

30 trades at +0.20R finishing at +6R — but it drops 3R below an earlier peak on the way. That stretch is what decides whether a trader is still there at the end.

For example

A system runs 30 trades at +0.20R expectancy and finishes at +6R. The curve is not a straight line: it dips 3R below its earlier peak partway through, which is the stretch that would test whether you actually keep trading the system.

Go hands-on in Premium

That's Equity curve in theory — it clicks when you read it on a live chart. Practise it hands-on in the TradeWize Premium Trading Psychology & Risk track.

Explore Premium →

Why it matters to you

Summary statistics hide the sequence. Expectancy and profit factor treat a record as an unordered bag of results, but you experience it in order, and the order is what determines whether you stay in the seat. The equity curve is the only view that shows that.

⚠ A smooth backtested curve is a warning sign

Real edges are noisy. A backtest whose equity curve rises in an almost straight line usually means the strategy has been fitted to the sample, or that costs, slippage and gaps have been left out. Suspicion, not enthusiasm, is the right response to a curve that looks too good.

Frequently asked questions

What is an equity curve?

It's a chart of an account's or strategy's cumulative profit over time, updated after each trade. It shows not just the final result but the path taken to get there — including every drawdown along the way.

What does a good equity curve look like?

Generally upward-sloping with shallow, short drawdowns and no long flat stretches. Perfectly smooth is not the goal and is usually a red flag; a real edge produces a rising line with visible noise around it.

What is a drawdown on an equity curve?

It's the fall from a peak on the curve to the lowest point before a new peak is made. Maximum drawdown — the deepest such fall — is the standard measure of how painful a strategy was to hold.

Why does the shape matter more than the final number?

Because you have to live through the path. A strategy that ends up profitable but spends six months in a deep drawdown will be abandoned by most traders before it recovers, which makes its final number unreachable in practice.

Related terms

BacktestingBacktesting runs a precisely defined set of trading rules over historical data to see how they would have performed on it. It is the cheapest way there is to reject a bad idea, and a poor way to prove a good one.Curve fittingCurve fitting, or over-optimisation, is tuning a strategy until it fits the historical data almost perfectly — including the random noise in it. The result looks superb in a backtest and fails immediately in live trading.ExpectancyExpectancy is the average amount you can expect to win or lose per trade, given your win rate and the relative size of your wins and losses. It is the single number that says whether a strategy makes money.Kelly criterionThe Kelly criterion is a formula for the bet size that maximises the long-run growth of capital, given your edge and your payoff. For a 40% win rate paying 2:1 it says risk 10% — and most traders deliberately bet less.
← Back to the full glossary