大佬们，币安的币本位合约，FMZ策略中怎么设置为逐仓呢，默认是全仓。

exchange.SetBase("https://dapi.binance.com")
ret = exchange.IO("api", "POST", "/fapi/v1/positionSide/dual", "dualSidePosition=true")
exchanges[k].IO("trade_margin")

这样设置双向合约、逐仓有问题，达不到要求