Which platform or software will notify me when an indicator condition has been meet

Hi guys

which software or platform will email me or has a pop up on it platform that will tell me a MACD crossover has just happened or a stochastic crossover has happened.

Thank you
Andrew

Most broker based platforms, but you can also look at tradestation from Netdania. With MT4 you can sent a notification to your phone or even smartwatch.