A trend is a trend until it is not a trend. Even in a ranging market it is either trending up to resistance or trending down to support. I learned the hard way, it is better to go with the market than trying to predict the market. Once one learns him/herself and take what the market gives them is when one becomes a consistant profitable trader. The great thing about the market, especially the currency market. You learn to flow with it or it takes you under, roll you on the bottom and spit you to the bank of rocks and asks you. Are you stupid enough to try again or are you smart enough to try again? Hopefully you are the later. However, most after dealing with that stay on the bank of rocks with thier ego, emotions and accounts obliterated and try to give advice to others based on a theoretical untested demo account that made a few imaginary pips. That's the bottom line truth of the matter!
Did they CONSISTENTLY call market turns? How about the failed predictions? It's possible to call market turns by: A. Sound fundamental analysis, you are usually too early. B. Technical analysis, you are usually too late. So, market turns (and their corresponding losses) are part of the trading. Make sure your strategy/leverage can handle this losses.