Profit Graph

A profit graph is a chart that shows how much money a trade would make or lose across a range of possible prices for the underlying stock or asset. The vertical axis shows profit or loss in dollars. The horizontal axis shows the price the underlying could be at, running from lower prices on the left to higher prices on the right.

To build one, you take a position — this could be a single stock trade, but the tool is most useful for options strategies, which combine several contracts with different strike prices (the price at which an option can be exercised) and expiration dates. You then calculate what the total position would be worth at each possible underlying price, and plot the result as a line or curve. Where that line crosses zero on the vertical axis marks a breakeven point; above zero is profit, below is loss.

Most profit graphs show the picture at option expiration, because that is when the payoff becomes simple and fixed — an option is either worth its intrinsic value or worth nothing. But a position can also be graphed at today's date, or at any date in between, which typically produces a smoother curve rather than the sharp kinks seen at expiration, because time value and volatility still affect the price before expiry.

The nuance that trips people up is assuming the expiration-day graph tells you what the trade looks like right now. A position can show a wide profit zone at expiration while still losing money this week if the stock moves the wrong way and time decay eats into the option's value. The shape of the graph also changes if implied volatility (the market's expectation of future price swings) rises or falls, which the basic expiration graph does not capture at all.