Rsi alert for nifty 500 stocks. any good app also suggest

hi.

i want to invest in NIFTY 500 stocks when RSI below 30. how to get alerts? any mobile app we have?

Do you want to trade or Invest ?

Investment not done based on RSI.

for swing trading you can use RSI but this alone is not sufficient. You Should combine it with other indicators like EMA crossover.