Sigh. A lot of the arguments here amount to "there is no heuristic that's 100% correct, so heuristics are useless". That's not how that works. TA ultimately is

Sigh. A lot of the arguments here amount to "there is no heuristic that's 100% correct, so heuristics are useless". That's not how that works. TA ultimately is supposed to give you insight into how the overall market is currently thinking about a specific stock. Of course it doesn't work by itself, because yes, new info changes attitudes. And yes, some heuristics are worse than others. Some are more sophisticated than others. But they help paint a picture. Sometimes, the picture is "hey, the market seems currently full of people making irrational decisions, they all disagree with me". That's a signal you look at your fundamental assumption to figure out if you're the fool, or they are. That's where TA makes sense. It's a way to highlight where to look, not a way to make decisions. In the complete absence of any other analysis? Probably not so much. Though I'd certainly love to see more thorough backtesting than one stock, one metric.