Profit factor is gross profit divided by gross loss. Below 1.0 the strategy loses money; 1.0 is breakeven; 1.25–1.5 is workable, 1.5–2.0 is solid, and above 2.0 is strong. Figures above 3 or 4 on fewer than 50 trades usually indicate a small sample or one outsized winner rather than a genuine edge.
Gross profit is the sum of every winning trade. Gross loss is the sum of every losing trade, as a positive number. Nothing is netted off — you add all the wins, add all the losses, and divide.
Twenty trades: winners totalling $8,400, losers totalling $2,540.
You made $3.31 for every $1.00 you lost.
| Profit factor | Reading |
|---|---|
| Below 1.0 | Losing. Gross losses exceed gross profits. |
| 1.0 – 1.25 | Marginal. Commissions, slippage or one bad month erase it. |
| 1.25 – 1.5 | Workable. A real edge, thin enough that discipline decides the outcome. |
| 1.5 – 2.0 | Solid. Most consistently profitable discretionary traders sit here. |
| 2.0 – 3.0 | Strong. Sustainable over a large sample is genuinely rare. |
| Above 3.0 | Check the sample before celebrating. |
That last row is not false modesty. A profit factor of 4 across 20 trades usually means one trade carried the whole number. Remove it and you often find 1.3. Across 200 trades a 4 would be remarkable — and worth checking for survivorship in how you recorded the data.
Profit factor is a ratio of totals, so it does not care whether your gross profit came from forty steady winners or one lottery ticket. Check the largest win as a share of gross profit. If a single trade is more than 30–40% of it, the ratio is describing that trade, not your process.
The ratio is silent on sample size. Six trades can produce a profit factor of 5. It means nothing. Treat anything under 30 trades as provisional and under 50 as indicative at best.
Two strategies can share a profit factor of 1.8 and feel completely different to trade: one grinding out small wins with a 65% hit rate, the other winning 35% of the time with long, ugly losing streaks. Profit factor says nothing about the path. Pair it with maximum drawdown and longest losing streak before deciding a strategy is tradeable by you specifically.
Profit factor and expectancy answer different questions from the same data.
A strategy can have an excellent profit factor and a trivial expectancy if it only triggers twice a year. Profit factor tells you whether the edge is real. Expectancy — multiplied by frequency — tells you whether it is worth trading.
Because it is a ratio of two sums, there are only two levers, and the denominator is almost always the softer target.
Most traders' gross loss is not evenly distributed. It is a handful of trades where the stop was moved, the position was oversized, or a loser was held hoping for a recovery. Find your five largest losses and ask what they have in common. If the answer is "I broke a rule," your profit factor problem is behavioural, not analytical — and capping those losses at your normal size moves the ratio more than any entry refinement will.
TradePiko shows profit factor alongside expectancy, win rate and drawdown — and lets you filter by setup, tag or mistake to see which parts of your trading are carrying the ratio and which are dragging it down.
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