HalfTrend (popularised by the Pine Script published by everget) draws a single stepped line under price in an uptrend and above price in a downtrend. Instead of ATR bands it uses raw channel extremes: the highest high and lowest low of the last N bars (the “amplitude”), together with N-bar moving averages of the highs and lows.
The line is latched: while the trend is up it only ratchets upward (tracking the ratcheted lowest-low level), and while the trend is down it only ratchets downward. A flip needs two things at once — the average of the lows (or highs) must cross the ratcheted extreme of the opposite side, and the close must break beyond the previous bar's high (or low). That double condition makes HalfTrend noticeably less flip-happy than a plain moving-average cross.
On a flip bar the new line starts exactly where the old line stood, so the indicator never gaps — it bends. Traders use it like SuperTrend: the line is the trailing stop, the side of the line is the trend filter, and flips are entry/exit signals.
Example
Amplitude 2, downtrend line at 51,000. The 2-bar average of lows crosses above the ratcheted lowest-high and the close breaks the previous bar's high — HalfTrend flips: the up line starts at 51,000 and begins ratcheting upward beneath price.
How Noon Barbari uses HalfTrend
Every concept here is implemented in the platform. Open the relevant docs or tool to see it in action.
Use HalfTrend in noonbarbari →Indicators using this concept
Related terms
- Indicators
SuperTrend
An ATR-band trailing stop on hl2 that flips when close breaches the opposite latched band.
- Risk
Trailing stop
A stop that ratchets in the trade's favor and never moves against it.
- Indicators
Parabolic SAR
Wilder's stop-and-reverse: an accelerating trailing stop that flips to the other side of price when hit.
- Indicators
Trend Magic
A wick-anchored ATR band that ratchets one way or the other depending on the sign of CCI.