Trend Sniper v2.5 [Jamallo]

3월 9일

(2025)

Intro

Trend Sniper v2.5 is built around a novel-unique core construction —
the Butterworth Stop: a ratcheting trailing stop anchored to a 2-Pole Butterworth Super Smoother and dynamically sized by Parkinson Volatility.

While each algorithm used is individually well-documented, this specific combination is rare and not found in standard indicator libraries — most Butterworth implementations are simply plotted as trend lines, not used as the structural anchor of a volatility-adaptive stop mechanism.

Break down:

2-Pole Butterworth Super Smoother (Core Trend Line) (smoothed price)

The backbone of the indicator is a 2-Pole Butterworth Super Smoother, a concept brought into trading by engineer and author John Ehlers, first published in his 2004 book Cybernetic Analysis for Stocks and Futures

In this indicator: The Butterworth filter runs on

close

with a user-defined period (default 20) and produces

bw_trend

— a clean, lag-minimized version of price. This smoothed value is not plotted directly. Instead, it acts as the anchor point for the trailing stop. The stop is placed at

bw_trend ± stop_dist

, meaning the stop hugs the filtered trend rather than raw price, making it far less susceptible to wick noise and erratic bars. Without this pre-filtering step, the trailing stop would oscillate erratically on volatile bars.

Parkinson Volatility (Sizes the Stop Distance)

"Developed by physicist Michael Parkinson in 1980, it estimates volatility using the natural logarithm of the high-to-low ratio each period, capturing intraday range rather than just close-to-close movement."

In this indicator: Parkinson Volatility is calculated over a rolling window (default 50 bars) and multiplied by

stop_mult

(default 1.2) to produce

stop_dist

. When markets are volatile,

stop_dist

expands and the stop gives price more room. When markets are quiet, it contracts and the stop tightens.

Butterworth Stop State Machine (The Main Line You Watch)

This is the primary plotted line, It's a classic ratcheting trailing stop built on top of outputs from steps 1 and 2.

In this indicator: The logic is a simple state machine with two modes — uptrend and downtrend. In an uptrend, the stop only moves up (never down), tracking at

bw_trend − stop_dist

. In a downtrend, it only moves down, tracking at

bw_trend + stop_dist

. When price closes on the wrong side of the stop, the state flips and the stop resets on the other side of the trend line. Because both the anchor

bw_trend

and the buffer

stop_dist

are noise-filtered and volatility-adjusted, the BW Stop flips far less often than a raw price-based trailing stop would, keeping you in trends longer.

Chande Momentum Oscillator + Deadband (Colors the BW Stop Line)

"The CMO measures momentum by calculating the difference between the sum of gains and the sum of losses over a specified period, dividing by their total to produce a normalized scale from -100 to +100 that accounts for both up and down days simultaneously."

In this indicator: CMO is calculated on

bw_stop

itself (not raw price), over 14 bars by default. A deadband of ±10 is applied — the line only turns bull-colored when CMO exceeds +10, and bear-colored when it drops below −10. It does not change color in between.

KAMA Midpoint (The Dynamic Midline and Fill Zone Anchor)
"Introduced by Perry Kaufman in 1995, KAMA dynamically adjusts its smoothing based on the relative efficiency of price movement".

In this indicator: Rather than applying KAMA to price directly, it's applied to the midpoint between the BW Stop and the Slow SuperTrend. This midpoint is a computed halfway value between the two lines. KAMA then smooths that midpoint adaptively, producing `kama_mid`. The fill colors you see on the chart are drawn between

kama_mid

and

bw_stop

— not between price and anything else.

Dual SuperTrend (Signals and Fill State Logic)
"Created by Olivier Seban, SuperTrend combines ATR-based volatility with trend detection into a single line that repositions dynamically as price confirms or breaks the current trend direction."

In this indicator: Two SuperTrend lines run simultaneously.

• The Slow ST (9× ATR) is the macro trend reference.
  
• The Fast ST (6× ATR) is never plotted at full size — it's compressed halfway toward the BW Stop and shown as orange circles

  fast_shortened

Putting It All Together

The flow through the indicator is linear: Butterworth smooths price → Parkinson sizes the stop → the state machine builds the stop line → CMO colors it → KAMA anchors the midline fill → the dual SuperTrend fires signals and shades conviction.

END
Every component feeds the next, meaning the final signals and visuals are the product of five sequential filters rather than any single calculation — which is what gives the indicator its resistance to false signals in noisy market conditions.

3월 10일

릴리즈 노트

Changes made:
- Removed the local `pi` variable in `f_super_smoother`, replaced with `math.pi` directly
- Removed intermediate `park_vol` variable, inlined into `stop_dist`
- Removed unused `st_hl2` alias for `hl2`
- Simplified `mid_raw` + redundant ternary away, replaced with `(st_slow + bw_stop) / 2.0` directly into `f_kama` call
- Same fix for `fast_shortened` → `fast_mid`, now `(st_fast + bw_stop) / 2.0`
- `fast_mid` extracted as a variable since it's referenced four times in the fills

3월 17일

릴리즈 노트

- HLC4 price source

3월 21일

릴리즈 노트

- Added Percentile Bands group in inputs with lookback period (default 100), inner percentile level (default 68%), and show/hide toggle

- Bands are built from `bw_deviation` — the rolling distance between `ha_close` and `bw_stop` — so the channel width reflects how far price historically strays from the filtered stop line