TradersPost does not support sending back to back signals at the same time. For example, if you want to exit an open position and immediately enter a new position on the other side, you cannot send an exit signal and entry signal at the same time. You would need to either send the exit signal and wait to send the new entry signal later, or if you need to exit and enter at the same time, then only send one signal and TradersPost will make sure that the exit order is sent first and will wait to send the entry order until the exit order is filled.