单向双向：某些产品的手续费只在开仓时收取，有些则在开仓和平仓时都收取； It can be crucial to check P&L statements from distinctive accounting intervals, as any improvements with time come to be extra meaningful in comparison to the quantities on their own. "hitparade.ch - Discographie PNL". Hung Medien. Retrieved 26 September 2016. ^ a b c d e file g h https://directoryunit.com/listings13148664/the-fact-about-pnl-that-no-one-is-suggesting