The LeManTrend implemented as a histogram of the smoothed difference between its signal lines.
The indicator uses SmoothAlgorithms.mqh library classes (copy it to <terminal_data_folder>\MQL5\Include). The use of the classes was thoroughly described in the article "Averaging Price Series for Intermediate Calculations Without Using Additional Buffers".
Figure 1. The LeManTrendHist indicator
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/14373
Semaphore signal indicator based on the LeManTrend indicator algorithm.VolatilityQualitySign
Semaphore signal indicator based on the VolatilityQuality indicator algorithm.