It shows 4 different Stochastic RSI and when all of them are oversold / overbought it gives buy (blue) or sell (pink) signals. This way by multipling basic periods you can monitor another timeframes.
For Example: 15 minutes - 14 (as a basic period) 1 hour - 14 x 4 = 56 4 hour - 14 x 4 x 4 = 224 1 day - 14 x 4 x 4 x 8 = 1792
But i recommend use it for close timeframe: 5M , 15M, 30M and 1H (to trade on 5M); or 15M, 30M, 1H and 4H (to trade on 15M)