Combines medium-term Bollinger envelopes with an ADX-weighted trailing stop logic. The ADX controls how far the stop sits from price and how wide the potential turning/ranging zone becomes, so strong trends pull the stop tight while low ADX expands the zone to highlight likely consolidation or reversal areas.

How to Use

Use bullTrail as a dynamic long stop: stay in bullish trades while price holds above it and exit/reverse if it closes below. Use bearTrail similarly for shorts. When turnTop and turnBot expand (low ADX), expect ranging or potential turning points; fading moves near those bands is safer than trend-following. In strong trends, rely on the tightened trail to ride the move and avoid fighting momentum.

ProBuilder Code

// PRC_AdaptTS with ADX Filter
// https://www.prorealcode.com
// Trading with ProRealTime
// 2026-02-04
// Nicolas
// ====================================

iprice = customclose
period = 20
adxPeriod = 14

upperBand = BollingerUp[period](iprice)
lowerBand = BollingerDown[period](iprice)
midline = (upperBand + lowerBand) / 2

adxValue = ADX[adxPeriod]
trendStrength = (adxValue - 15) / 35
if trendStrength < 0 then
   trendStrength = 0
elsif trendStrength > 1 then
   trendStrength = 1
endif
rangeFactor = 1 - trendStrength

// Adaptive bases for the trailing stops
bullBase = lowerBand + (midline - lowerBand) * trendStrength
bearBase = upperBand - (upperBand - midline) * trendStrength

// Initialize trails on the first bar
if barindex = 0 then
   bullTrail = bullBase
   bearTrail = bearBase
endif

// Bullish adaptive trail: ratchets upward in uptrends
if iprice > bullBase then
   bullTrail = max(bullBase, bullTrail[1])
else
   bullTrail = bullBase
endif

// Bearish adaptive trail: ratchets downward in downtrends
if iprice < bearBase then
   bearTrail = min(bearBase, bearTrail[1])
else
   bearTrail = bearBase
endif

// Turning/ranging zone shrinks with strong trends and expands with weak trends
turnTop = midline + (upperBand - midline) * rangeFactor
turnBot = midline - (midline - lowerBand) * rangeFactor

if trend>=0 and iprice crosses under turnbot then
   trend = -1
   alphabull=0
   alphabear=255
   colorR=2
   colorG=72
   colorB=115
endif

if trend<=0 and iprice crosses over turntop then
   trend = 1
   alphabear=0
   alphabull=255
   colorR=165
   colorG=42
   colorB=42
endif

RETURN bullTrail COLOURED(colorR,colorG,colorB,alphabull)  style(line,2), bearTrail COLOURED(colorR,colorG,colorB,alphabear) style(line,2)