I don't know, but since it says "BrokerSell USDCHF_FXCM: 772 ms", I'm going to guess that this is the time it takes your FXCM plugin to process the BrokerSell call. If true, your plugin blocked for 0.772 seconds!
http://zorro-project.com/manual/en/brokerplugin.htmI certainly hope I am incorrect.
In the case of broker arbitrage, it is preferable to send both orders, then confirm both outcomes later, rather than to order-block-confirm, order-block-confirm.
