A very good website i use for technical analytic is tradingview , If you know how to work with tools , you also can follow some of the best in technical analytic and guess the price , remember , nothing is guaranteed in here , they are just predictions could be right or wrong.
I agree to you that tradingview is a useful website with a lot of protrader that give signal wich coin will be pump up but in the end no one will know what will happen to that altcoin in has a possibility to pump up or falling down all you need is a good research and analysis because market is a full of suprises and also big whale.