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再帮忙解释下一段代码

void trall( int step) { if ( MarketInfo ( Symbol (), MODE_STOPLEVEL ) > step * gPoint / Point ) return ; int ordersTotal= OrdersTotal (); for ( int i=ordersTotal- 1 ; i>= 0 ; i --) { if ( OrderSelect (i, SELECT_BY_POS , MODE_TRADES )) { if ( OrderSymbol ()== Symbol

谁能读懂这段代码请帮忙解释

void closeOpder(int cmd) { bool er=false; int error=0; RefreshRates(); ResetLastError(); while(true) { if(cmd==OP_BUY) { er=OrderClose(OrderTicket(),OrderLots(),Bid,gSlippage,Blue); } if(cmd==OP_SELL) {