This is an RSI Oscillator with an EMA of the RSI for a signal line. The RSI line is Green when above the signal line and Red when below the signal line.
This does not use the traditional 30% / 70% over sold / over bought analysis. Therefore the levels are not shown.
The analysis is this: When the RSI is above the signal line then price has a bullish bias. When the RSI is below the signal line then price has a bearish bias.
I wrote use this for Forex Spot Currencies where I feel overbought and oversold may be less valid than it may be in other markets such as stocks.
As with all indicators, do not use as your sole reason to enter the market, but use with other indicators or price action signals to get a confluence of signals to confirm your entry.
I use it with an 8, 21 and 50 EMA to confirm entry and exit. I give it more weight for exits than I do for entries.