Share count = the amount you are willing to lose, divided by the distance between entry price and stop price.

Example: a 100,000 account, half a percent of risk per trade — 500. The stock trades at 50 and the structural stop sits at 47, so 3 of risk per share. 500 divided by 3 is 166 shares, a position of about 8,300. Note: the position is large but the risk inside it is small — because the stop is close.

The same stock with a wider stop yields a far smaller position. That's the correct outcome: a volatile stock gets less capital, a calm one gets more, and the loss in both is identical. Without this calculation you risk completely arbitrary amounts per trade, and a few bad trades in volatile names erase months of work.

A common mistake: a fixed cash size per position ("always ten thousand"). It looks tidy but produces a varying risk — 200 one time, 2,000 the next — which is exactly the opposite of what you wanted.

The calculation caps the loss, not the exposure. If it produces a position bigger than 15–20% of the account, cut it even when the risk rule is satisfied — an outsized opening gap can jump straight over the stop. A beginner needs no leverage at all: it scales gains and losses equally, but multiplies the psychological pressure.