How To Calculate Trading Profit

Trading profit is the money a trade makes after the cost of putting it on and taking it off. The gross figure is the price move multiplied by the quantity, and the net figure subtracts the fees charged on both sides.

A long trade profits when the exit price is above the entry price. The gross profit is the difference multiplied by the quantity, and it grows linearly with the size of the position.

A short trade profits when the exit price is below the entry price. The trader sells first and buys back later, so the profit is the entry price minus the exit price, multiplied by the quantity.

The fee is charged on both the entry and the exit notional, which is the price multiplied by the quantity on each side. Writing it as the fee rate times the sum of the two notionals is the same as charging it twice, and it is the reason fees bite harder than traders expect.

Net profit is the gross profit minus the fees. It is the figure that actually changes the account balance, and it is the figure that should be recorded rather than the gross.

Return on capital expresses the net profit as a percentage of the capital committed, which is the entry price multiplied by the quantity. It allows trades of different sizes to be compared fairly.

Spread is a hidden cost that behaves like a fee. The bid-ask gap is paid on entry, and on a liquid instrument it is small, but on an illiquid one it can exceed the commission.

Funding or financing costs apply when a leveraged position is held overnight. On a multi-day trade the accumulated financing can outweigh the price move, turning an apparently profitable direction into a loss.

Position size is the biggest lever on both profit and risk. Doubling the quantity doubles the gross profit and the fee, but it also doubles the loss if the price moves against the position, which is why sizing is the first risk decision.

The break-even move is the price change needed to cover the round-trip fee. It is the fee divided by the quantity, added to the entry price for a long or subtracted for a short, and it is the hurdle every trade must clear.

Traders often quote gross profit because it flatters the result. Recording net profit and return on capital gives an honest picture of whether a strategy is worth running after costs.

A trader who measures only the win rate is measuring the wrong thing. A strategy that wins six trades out of ten but pays a fee on every one can lose money, while a strategy that wins four out of ten with larger winners and the same fee can be profitable. Net profit per trade is what settles the question.

Recording the net result of every trade, rather than the gross, builds the only reliable picture of whether an approach works. Over a hundred trades the fee drag compounds, and a strategy that looked marginally profitable on gross figures often turns out to be a net loser once the costs are counted.

The calculator models the figures entered and nothing more. It does not know the spread, the financing or the tax treatment. Treat the output as the profit after the stated fee and adjust for the other costs separately.