Yes, that happen sometimes in forex trading. Newbies who are still looking at luck to help them make profits always open trades without analysis and then they might get their TP hit by mistake, the market was just in their favour. But it not easy to get if we dont have a knowledge about it i have made it only once or twice i think.i opened a trade and it was running in loss and market closed for week end.and when it opened all my negative pips got converted to positive and trade closed with profit.but if you make profit dont think same will happen next time so be careful.