ما معنى Strategy capacity, capacity curve, profit-maximising size؟

A capacity curve gives a strategy’s net return, net Sharpe ratio and dollar profit against the size of the capital it runs, each size traded with its costs. The profit-maximising size is the size at which dollar profit peaks. A strategy’s capacity is the size beyond which a stated criterion fails: here, the size at which its net Sharpe ratio falls to half its best.