Trend Intensity Index as described by M.H.Pee in his article "Trend Intensity Index".
To calculate a 30-day Trend Intensity Index (TII), follow these steps:

Leader of the MACD - Extended
This version extends the basic version of Leader of the MACD with some options that are adding more flexibility to the usage of the indicator.
Trend Strength Average
Trend Strength Average uses some of the 4 regular types of averages for trend strength assessment.
Heiken Ashi Zone Trade
Heiken Ashi Zone Trade indicator is based on 3 indicators: Heiken Ashi, Accelerator Oscillator, and Awesome Oscillator.
Heiken Ashi Zone Trade - Separate
This version of Heiken Ashi Zone Trade indicator is made to display values in a separate window - that way it will not interfere with the other on-chart indicators and can be easier to read the states in some cases.