I would like to be able to place a Limit order at a specific price, and then when the order is placed, put another limit order at the previous price. I know how to open and close trades, but haven't worked with Limit orders. Does anyone have ideas on how I would accomplish this?
Limit orders are placed same way you place trades - with OrderSend(). Difference is only in second parameter of OrderSend() where you specify type of order you want to send.
int ticket=OrderSend(Symbol(),OP_BUYLIMIT,1,price,3,stoploss,takeprofit,"My order",16384,0,clrGreen);
Of course, you must take care that parameters are correct for selected order type.