Delta and Cumulative Delta Histogram

This script visualizes volume delta (difference between buy and sell volume) using either:

Instant delta (per bar), or

Cumulative delta, for trend observation.

⚙️ Key Inputs:

aggr: Toggles between Cumulative vs Per-bar delta display.

ratio: Option to normalize delta as a ratio (buyVolume/totalVolume), adjusted for direction.

colbuy, colsell: Colors for buy and sell delta bars.

📊 How It Works:

Delta Calculation

If ratio is true, delta = buyVolume / volume, then adjusted by sign.

Else, raw delta = buyVolume - sellVolume.

Cumulative Delta (cdelta)

Accumulates delta only when direction is consistent (both current and previous deltas are either positive or negative).

Resets if the direction changes.

Plotting

If aggr is ON → plots cdelta as a histogram.

If aggr is OFF → plots raw delta as histogram.

📈 Use Case:

Ideal for orderflow traders and volume-based strategies.

Helps identify momentum shifts, buy/sell pressure trends, and divergences.