I like that it has many features for technical analysis, candlesticks etc., which are very useful to me as trader! It's not easy at first because there isn't much tutorials or guides available in English language but you can find them easily after some time using this tool (I'm from Spain so my english might be bad).
The best thing about tradingview compared other tools i've used before such QuantConnect was its simplicity when creating charts/indicators; also they have good support team if something goes wrong while working :D If anyone wants more complex indicators than just moving averages then go ahead try out quantconnect instead :) great product overall!! simple charting interface without too complicated options-it makes things easier especially during market hours where we need quick access data ;-) Also helps us calculate our risk management by calculating volatility levels -which gives insights into how volatile markets really behave.-also helpful since.