TradingView - the most flexible tool for full-fledged trading with custom features and approach to analysis!
TradingView Indicators
TradingView offers a variety of indicators including traditional ones built into many platforms, such as moving averages, stochastics, MACD, relative strength index, CCI, pivot points and so on.
There is also a special public library of indicators created by users. The built-in marketplace allows you to purchase indicators on a subscription basis from $19.95 to $149 per month.