RSI divergence is a condition where price action and the Relative Strength Index move in opposite directions. When price makes a new high but RSI stalls at a lower high, or when price drops to a fresh low while RSI forms a higher low, the two signals disagree. I've watched this pattern flash on AAPL weekly charts more times than I can count — the stock prints a lower low, RSI refuses to confirm, and within a handful of bars the trend has reversed.
On TradingView, automated indicators do the scanning for you. They flag those mismatches between price and momentum so you don't have to inspect every peak and trough manually. Paired with a thorough Backtest Indicator TradingView: Complete Guide to Testing Your Trading Strategies, they help you decide when a trend is losing steam.