RSI+MACD

One technical indicator that can be used in conjunction with the RSI and helps confirm the validity of RSI indications is another widely-used momentum indicator, the moving average convergence divergence (MACD). This indicator calculates momentum differently from the RSI by comparing the relative positions of a short- and long-term moving average.

Traders primarily monitor the MACD for signs of momentum diverging from price. While the price may continue to move up, with the RSI maintaining overbought readings for quite some time, the MACD shows divergence by beginning to turn down as the price continues to advance. That provides an additional indication confirming that a market may be reaching a level where it is overextended and, therefore, likely to retrace soon.
The MACD and RSI are both contrarians by design. They go against popular opinion by signaling to buy when there is a lot of selling and signaling to sell when there is significant buying. When both indicate buying, then the security is more likely to be genuinely oversold. Similarly, the security is probably overbought and headed downward when both RSI and MACD generate sell signals.