You are right about that. TA simply paints a picture of the past. As for predicting the future, TA is useless, especially when the asset is a pump and dump.
Taking a chart and marking it up after a bloodbath is not predicting price with charts. Look back through my posts about April (??) I said back then to hold on to our britches, BTC was about to take a beating. Did not need a chart for that, its not magic. Its called a global financial meltdown