The real author: MIKHAIL
Smoothed Ichimoku oscillator. This indicator was first implemented in MQL4 and published in the CodeBase on 29.03.2010.
The indicator uses SmoothAlgorithms.mqh library classes (copy it to <terminal_data_folder>\MQL5\Include). The use of the classes was described in detail in the article “Averaging Price Series for Intermediate Calculations Without Using Additional Buffers”.
Fig1. The ICHI_OSC indicator