I think my worst trading decision is EMC2. LOL. I spent about 0.2 BTC to buy EMC2 when its price was only 0.00001 BTC/EMC2 then I sold it for 0.00002 BTC/EMC2. Also I doubled all my money but if I were more patient at the time maybe I would have earned more than that 7 or 8 times cause only 1 month after that EMC2 price rised to more than 0.0001 BTC 
Well, that is if the OP is talking about signals gotten from indicators, Technical analysis and Fundamental analysis.In this case, I am sure the OP is referring to Telegram signals where someone calls the shot and the followers do the usual thing which is to follow blindly. That is a huge problem for someone who wants to trade, because there is no way they cannot end up losing a lot at the end. It is always good to have the knowledge and be able to make decision without being told what to do.
I was just talking about dumb trades that people have made. Following other traders blindly is a sure path to destruction, though!
