For example, if you enter a longtrade and the prices continue to move up, then exit a portion, say 30%, of your position after prices reach a certain point.
Colmar has long been considered the capital of the wine trade.
科尔马长久以来一直被誉为葡萄酒贸易之都。
《柯林斯英汉双解大词典》
3
Long-distance trade in obsidian probably gave the elite residents of Teotihuacán access to a wide variety of exotic good, as well as a relatively prosperous life.