I try to find some apps for indicators. To alert me when indicators for some coin reach some value but I could not find any apps for that so I am trying to create one.
I think trading view has that feature if you set it properly, I've tried it couple of times already in the past and it's seems okay. I think SMA should be your next target and yes Bollinger Band is a nice indicator to be added too.
Personally I don't use indicator but only uses price action. But still with Tradingview, I am able to set alerts on certain level. It's nice because as long as my phone is connected to a wifi service, I am able to get alerts specifically to my levels right after price traded to it. It's very convenient because I no longer be on the market every single time waiting but instead get notified that its okay for my system to traded once my alert is hit.