The real author:
The QQECloud is the indicator of quantitative and qualitative evaluation based on rather complex calculations of the RSI smoothed indicators.
The indicator is performed in two variants - from two lines (QQE) and in the form of the color cloud (QQECloud).
The indicator uses SmoothAlgorithms.mqh library classes (must be copied to the 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".
Fig.1 The QQE and QQECloud indicators
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/1599
The Acceleration/Deceleration Indicator (AC) measures acceleration and deceleration of the current driving force.Average Directional Movement Index (ADX)
The Average Directional Movement Index Indicator (ADX) helps to determine if there is a price trend.