Not that I know. When several trades are opened at the same time, Zorro opens the first one and then waits for confirmation. Depending on broker and market, this can in extreme cases take up to 2 minutes. Only after the confirmation is received, Zorro opens the next trade. So the trades are not opened in a single batch, but one after the other. This is necessary since the MT4 client is unresponsive between calling and returning from the OpenOrder function. Sending all trades at the same time would not work.