The limited information I've found makes it doubtful that I am understanding these Indicators correctly, but you may wish to try the following:
A Laguerre RSI with a gamma of .5 could be created as a Custom Indicator as follows:
Select Chart Template | Add Indicator | Indicator.
- Visible: Checked
- Center Zero Line: Unchecked
- Plot using price scale: Unchecked
- Smoothing Average: 1
- Average Type: Doesn't matter (because the Smoothing Average is 1)
- Indicator Formula: (ABS(C >= XAVGC3.1) * (XAVGC3 - XAVGC3.1) + ABS(C1 >= XAVGC3.2) * (XAVGC3.1 - XAVGC3.2) + ABS(C2 >= XAVGC3.3) * (XAVGC3.2 - XAVGC3.3))/ (ABS(XAVGC3 - XAVGC3.1) + ABS(XAVGC3.1 - XAVGC3.2) + ABS(XAVGC3.2 - XAVGC3.3) + .0000001)
Adjusting the gamma would involving changing the Exponential Moving Average Period used within the Indicator Formula.
A Fisher Transform (using a Stochastic of Price for normalization instead of a Stochastic of (H + L) / 2) could be created as a Custom Indicator as follows (the Stochastic Period and Smoothing Average can both be adjusted):
Select Chart Template | Add Indicator | Indicator.
- Visible: Checked
- Center Zero Line: Unchecked
- Plot using price scale: Unchecked
- Smoothing Average: 3
- Average Type: Exponential
- Indicator Formula: LOG((ABS(STOC10 = 0) * .000001 + STOC10 / 50) / (ABS(STOC10 = 100) * .000001 + 2 - STOC10 / 50)) / 2
You may wish to review the following:
Plotting Custom Indicators with Examples
Handy PCF example formulas to help you learn the syntax of PCFs!
PCF Formula Descriptions