This Accumulation/Distribution indicator has three calculation methods:
It has one input parameter:

Fig.1 Classical

Fig.2 Classical Incremental (MetaTrader)

Fig.3 Trade Station Incremental
Translated from Russian by MetaQuotes Ltd.
Original code: https://www.mql5.com/ru/code/20124
SSS
SSS (Special Slow Stochastic) has an additional smoothed (slow) line based on the Stochastic signal line.
Small_Inside_Bar
The "Small Inside Bar" indicator. It searches for formations, in which the internal candlestick of the "Internal bar" pattern is not more than half the size of the determinant candlestick.
Fractured Fractals
The Expert Advisor uses the Fractals indicator signals to place pending orders and trail the Stop Loss level of positions.
MathCeilRoundFloor
Example of functions MathCeil, MathRound and MathFloor.