Ascending Base
By LuxAlgoJul 28, 2026
Ascending Base is an indicator on Vela, our next-generation charting platform, written in Pine Script®.
Ascending Base is the library's first mechanical detector for the ascending base, the three-pullback growth-stock consolidation: swings confirm with a 5-bar pivot, each pullback must retrace 10–20%, highs and lows must staircase upward, and the base must span 40 to 85 bars. Qualifying bases are outlined with depth labels plus buy and invalidation levels at the third-pullback high and low.
Optional filters complete the specification: a 50-period trend filter, 1.4× breakout volume, pullback volume contraction, and a weak-market benchmark check.
How to Trade the Ascending Base?
- Ascending Base label: structure confirmed; the buy point is the third-pullback high.
- Breakout: a close above the buy level on qualifying volume, the entry event, arming the fixed stop.
- Invalidated: a pre-breakout close below the third-pullback low voids the base.
- Stop Hit: a post-breakout close below the 7% stop ends the campaign.
Bar-count defaults assume daily charts (40–85 bars ≈ eight to seventeen weeks); retune on other timeframes.
Ascending Base Settings
- Swing Detection Length (default 5): pivot width; larger returns cleaner swings, later.
- Pullback Depth (%) (defaults 10 and 20): the required retracement band per pullback.
- Base Duration (bars) (defaults 40 and 85): allowed span of the base.
- Prior Uptrend Filter (default on, length 50): the first high must sit above this average.
- Breakout Volume Confirmation (default on), with Volume Average Length (default 50) and Breakout Volume Multiplier (default 1.4).
- Pullback Volume Contraction (default off): pullback legs must average below the baseline.
- Weak Market Filter (default off, SP:SPX): the benchmark must be lower at the third low than at the start.
- Fixed Stop After Breakout (default on, 7%): the stop tracked under the buy level.
- Style toggles cover the pattern outline, depth labels, and the buy and invalidation levels.
Frequently Asked Questions
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