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Why MarketBookAdd failing?
Code below fails with error 4901 (ERR_BOOKS_CANNOT_ADD) regardless of broker. But I know such a code worked some time ago. Possible reason(s)? string symbol = "EURUSD" ; int OnInit () { ResetLastError (); if ( SymbolSelect (symbol, true ) != false ) { if (
can mt5 operate in non-fifo mode?
..or is fifo mandatory across all brokers