Real author:
TrendLaboratory Ltd.
Indicator XFisher_org_v1_Candle highlights candles, the Close prices of which are closed within overbought/oversold zones.
The indicator uses the classes of library SmoothAlgorithms.mqh (to be copied to <terminal_data_directory>\MQL5\Include). The use of the classes was thoroughly described in article Averaging Price Series for Intermediate Calculations without Using Additional Buffers.

Fig1. Indicator XFisher_org_v2