Swing trading position sizing
A swing alert becomes an account decision when entry, stop distance, share count, overnight gap allowance, liquidity, and portfolio concentration are connected to one risk budget.
Define the loss before entry
Start with the cash amount the account can lose on one idea. Translate it through entry, stop, share count, commission, spread, and a gap allowance. A swing position may move while the market is closed, so the planned stop is not always the worst achievable exit.
Liquidity and gap allowance
A quoted price is not proof that a large order can exit there. Review spread, volume, displayed depth, session, and the likelihood of a thin open. A small account can still be over-sized if the stock gaps or the position takes too long to liquidate.
Correlation and open exposure
Several swing alerts may share a sector, factor, event, or macro risk. Treat them as related exposure when setting the portfolio budget. A list of different tickers is not automatically diversified if the same shock can move them together.
What the service should disclose
- Whether results assume fixed shares, fixed cash risk, or changing size.
- How gaps, stops, partial fills, and time exits are handled.
- Whether returns are gross or net of commissions, spread, and other costs.
- How open and correlated positions are treated.
- Whether the record is a signal history or an account history.
Use the checkable-record criterion to distinguish a published signal from a hypothetical portfolio outcome.
Bottom line
Good swing sizing is conservative by design. It converts the stop into a cash boundary, discounts gaps and illiquidity, and limits combined exposure before the alert becomes an order.