What GMT is widely used? Obviously, different brokers are on different GMT, so candle closes on daily and H4 chart are different, that can give false signals, like one candle could be hammer at one broker, and there is no hammer at the other broker's chart, pretty tricky, and s/r levels based on candle close are different. So is there some GMT that bigger players or most traders prefer?
Maybe London GMT +1, or New York GMT -5?
Maybe London GMT +1, or New York GMT -5?