I would not be surprised. MM is the key in such cases. Once I tested my home made EA that was supposed to buy GBPUSD each morning on 9 am GMT, as far as I remember the SL was 100 pips and TP was 200 pips (or some similar 2R ratio). Tested over five years or more it provided positive results... :-) Unfortunately, I lost it during a HDD crash so I cannot provide exact details. I tested it with Forex Tester 2.