TradingView is effectively the standard for charting on both web and app, with plenty available on the free plan alone.
1. Powerful indicators and drawings
From core indicators (moving averages, RSI, MACD) to tens of thousands of community-built ones, everything applies with a click. Trend lines, Fibonacci and support/resistance drawing tools are precise.
2. Alerts
Set conditions like "notify when price breaks this line" and get push or email alerts — no need to watch the chart all day.
3. Why it helps with momentum trading
Momentum trading is about reading price action and volume. TradingView switches timeframes fast and lets you lay out several tickers side by side.
A classic combo: pick names on Finviz, time the entry on TradingView.