some time ago I bought an altcoin which has a low marketcap and trading volume. I bought after analyzing using technical indicators. After a while I realized something was wrong. it should be if based on my analysis the coin I bought has entered an oversold period and the price should have started to reverse. but in fact it never happened. the price may go up, but it doesn't last long and it goes back down. then I also bought another altcoin which is almost the same. and again, I also experienced the same thing even though in the end I got profit thanks to long-term hold.
It certainly won't work as your might buy coins that have a low market cap and are worthless. Even you buy them all, you can never expect that there is a profit that it get you back. Honestly, you've got the wrong coins to invest. If you have money, better to look at potential altcoins and it makes sense, though.
Then I started thinking and wondering, why is it difficult to apply technical analysis to coins with low market caps. unlike bitcoin and other major altcoins whose movements are still predictable. Altcoins with low market caps are difficult and even impossible to predict. whether this is all related to manipulation or there are other reasons that make it difficult to predict.
You don't need to wonder as TA cannot be 100% working even in Bitcoin, as you have thought of. I don't have a figure actually but based on my experience that is something 70-80% working on me. Of course, that also matters on the trend and the coins of your chossen.