Start Small

Start small is a way of entering a trade by opening a smaller position than your maximum planned size, rather than committing your full intended size all at once. Instead of buying, say, 1,000 shares the moment you decide a setup looks good, you might buy 300, see how the trade develops, and add more later if it behaves as expected.

The logic is simple: at the moment you enter, you don't yet know if the trade is going to work. Starting small reduces how much capital and emotional weight is riding on that uncertain first decision. If the trade moves against you right away, your loss is smaller than if you'd gone all-in. If it moves in your favor, you can add to the position — a practice often called "scaling in" — buying or selling more at a better-confirmed price, effectively building your full position in stages instead of one shot.

The nuance that trips people up is that starting small isn't free. It usually means your average entry price on the full position ends up worse than if you'd just bought the whole size at the start, because you're adding at higher prices (in a long trade) as the trade confirms. It also means your initial size may be too small to matter much even if the trade works, so some traders end up chasing size later at worse prices. Starting small is a risk-management choice, not a way to get a better price — it trades away some potential profit and precision in exchange for a smaller worst-case loss and more confirmation before committing fully.

It's also distinct from position sizing based on a stop-loss and account risk percentage. You can start small as an additional layer on top of proper position sizing — for example, deciding your full size is 500 shares based on your risk rules, but choosing to open the trade with only 200 of those shares initially.