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Step one: define the position precisely
Start with a single example and state every input: underlying price, option type, strike, premium and number of contracts. Take a long call with a 50 strike bought for a premium of 2. Write the position in one sentence, then list what the reader must know: contracts usually cover 100 shares, so the premium costs 200. Fixing these numbers first prevents confusion later and lets the reader recalculate by hand. Keep one example per page section, and add multi-leg strategies only after the single-leg chart is understood.
02
Step two: compute and plot the expiry outcome
Calculate profit or loss at expiry across a range of underlying prices, such as 40 to 60. For the long call, the value at expiry is the greater of zero or price minus 50, then subtract the premium of 2. Below 50 the loss is flat at 2 per share; the break-even sits at 52; above that profit rises one for one. Plot price on the horizontal axis and profit on the vertical axis, mark the zero line, and label the break-even, maximum loss and slope so the shape is readable at a glance.
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Step three: explain, check and extend
Beneath the chart, write a short reading in plain words: what the worst case is, where break-even falls, and what happens if the price rises sharply. Let readers change strike and premium and watch the line move, then check the output against the hand calculation. Add a note that the chart shows expiry only, before time value, fees or taxes. Extend to a put, then a spread by adding the legs together at each price. Close with a prompt that asks the reader to predict the shape before revealing it.