JustScreener vs TradingView screener
TradingView is the chart, not the watcher. Its screener scans only when you open the tab; alerts happen on indicators, not on cross-pair scans. Pick TradingView when you trade off charts manually and want the deepest charting toolkit. Pick JustScreener when you want background monitoring — the scanner runs while you're away from the screen.
Best with TradingView, not instead. Most JustScreener users keep TradingView open for the chart and run our screeners in parallel for notifications.