Forecasting tools may have value when you are trying to predict the weather (and even there they are more often than not quite bad depending on the time horizon of course), but in markets forecasting tools are problematic as they never catch the critical outliers that can destroy your investment totally. The reason it sometimes works is because everyone uses the same tools and they function like a sort of shelling point then. That sets free a herd movement towards that new price point. The question then becomes who chooses the smartest spot to sell before everyone else takes the opportunity.
This is not wrong, I have used many trading tools before but they are all the same, if it works this time does not mean it will work next time, the failure is that the bigger the loss. The best is to go for good coins like bitcoin, ethereum and binance coin when the price has decreased already, they all follow the price of bitcoin, wait for the price to decrease and buy. If the price has increasesld then sell, this is working for me.
Yes, if you go for the bigger market cap coins with a positive history, outliers aren't a problem. Those coins can of course also drop in price sharply, but they will return back to normal. That might be very different for low market cap coins that after dropping sharply in value just die subsequently or don't recover fully ever.