Metatrader 4 Build 880 Error 131 (invalid volume) Workaround
It seems that Strategy Tester in disconnected mode throws errors 131 (invalid trading volume) after the update to 880 or 890, when testing any strategies .
The artificial copy of the broker environment created with the Test Helper script cannot be used for testing with builds 845+ any longer . The last known build suitable for the offline testing was 842 […]
Fig. 1 – Daily Candlestick chart of EFOI. It went up 136% from US$9.26 to $21.90.