[BCT] Identify BULL / BEAR regimes - Laguerre Filter

The Adaptive Laguerre is based on the Laguerre filter, described by John Ehlers in his paper “Time Warp – Without Space Travel”

MAs obtained using a Laguerre filter tend to have much lower lag than MAs obtained from an SMA or EMA .

Use cases:
- Identify market regime (BULL vs BEAR)
- Smooth out a noisy signal (e.g. apply to RSI , prices, log returns, variance, etc) without adding excessive lag

Highlight based on:
- Smoothed indicator > or < 0
- Derivative of the indicator ("speed") > or < 0
- Second derivative of the indicator ("acceleration" or "momentum") > or < 0