Ulcer Index (UI) shows the volatility decrease risk. It indicates lowering volatility, i.e. a possible drawdown or recovery within a given period.
The indicator has three input parameters:

Fig.1. Direct calculation

Fig.2. Inverse calculation
Traduit du russe par MetaQuotes Ltd.
Code original : https://www.mql5.com/ru/code/20274
JP Oscillator
A trend oscillator.
Highest Lowest
The Highest Lowest indicator searches for bars having High above the High of bars on the left and on the right, as well as bars having Low below the Low of bars on the left and on the right. Uses the DRAW_ARROW style.