市价单问题

1）开单信息 022-01-21 18:24:32 信息 开空单,sellOrderId 404702825422401536 2022-01-21 18:24:32 Futures_OKCoin 卖出开空 - swap 市价单 1 2022-01-21 18:24:32 信息 持仓小于最大开仓量，可以多单

2）代码 function orderOpen(way, price, amount) {

if (way == "LONG") {
    return trade("buy", price, amount)
} else if (way == "SHORT") {
    return trade("sell", price, amount)
}

}

else if (position.length == 0) { Log(“空仓，直接开单”) buyOrderId = orderOpen(way, -1, amount) Log(“开单完毕：buyOrderIduyOrderId=”, buyOrderId) }

为什么多单就是市价单，空单就是委托单呢？谢谢