I have a problem loading my script onto my MQL4 for mac. Please help

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Closing all open trades if all one symbol and one trade direction:
All open trades must be of same symbol and type, e.g. all GBPUSD and all BUY. This script will close out your position using one large trade to hedge your position then using CloseBy() function to close all trades against the one large trade until all trades are closed. There can be a maximum of 500 open trades.
Author: Filip Jankovic