Linh Index Trend & Exhaustion Suite

Purpose: One overlay to judge trend, reversal risk, overextension, and volatility squeezes on indexes (built for VNINDEX/VN30, works on any symbol & timeframe).
What it shows

Trend state: Bull / Bear / Transition via 20/50/200 EMAs + slope check.

Overextension heatmap: Background paints when price is stretched vs the 20-EMA by ATR or % (you set the thresholds).

Squeeze detection:

Squeeze ON (yellow dot): Bollinger Bands (20,2) inside Keltner Channels (20,1.5).

Squeeze OFF + Release: White dot; script confirms direction only when close > BB upper (up) or close < BB lower (down).

52-week context: Distance to 52-week high/low (%).

Higher-TF alignment: Optional weekly trend reading shown on the label while you’re on the daily.

Anchored VWAP(s): Two optional AVWAPs from dates you choose (e.g., YTD open, last big gap/earnings).

Plots & labels

EMAs 20/50/200 (toggle on/off).

Optional BB & KC bands for diagnostics.

AVWAP #1 / #2 (optional).

Status label with: Trend, EMAs, Dist to 20-EMA (%, ATR), 52-week distances, HTF state.

Built-in alerts (set “Once per bar close”)

EMA10 ↔ EMA20 cross (early momentum shift)

EMA20 ↔ EMA50 cross (trend confirmation/negation)

Price ↔ EMA200 cross (long-term regime)

Squeeze Release UP / DOWN (BB breakout after squeeze)

Overextension Cool-off UP / DN (stretched vs 20-EMA + momentum rolling)

Near 52-week High (within your % threshold)

How to use (playbook)

Map regime: Prefer trades when Daily = Bull and HTF (Weekly) = Bull (shown on label).

Hunt expansion: Yellow → White dot and close beyond BB = fresh move.

Avoid chasing stretch: If background is painted (overextended vs 20-EMA), wait for a pullback or intraday base.

Locations matter: 52-week proximity + HTF Bull improves breakout quality.

Anchors: Add AVWAP from YTD open or last major gap to frame support/resistance.

Suggested settings

Overextension: ATR = 2.0, % = 4.0 to start; tune per index volatility.

Squeeze bands: BB(20,2) & KC(20,1.5) default are balanced; tighten KC (1.3) for more signals, widen (1.8) for fewer/higher quality.

Timeframes: Daily for signals, Weekly for bias. Optional 65-min for entries.