Cumulative volume delta, free.

What you get

• A running total of aggressive buying minus aggressive selling, plotted under price
• Built from the real aggressor flag on each trade where the venue publishes it
• Divergence against price is readable directly: a higher price high with a lower delta high
• Works on every timeframe the chart offers, including sub-minute and range bars
• Sits alongside the other ninety-three studies with no limit on how many you add

Why this is usually paid for

Delta needs the trade tape rather than candle volume, so platforms that only ingest candles cannot offer it at all, and those that do ingest the tape tend to treat it as a premium data feature. The result is that a fairly simple calculation ends up behind a subscription.

Basis already loads the tape for order-flow features, so delta costs nothing extra to compute. Charging for it would mean metering something already fetched for another purpose.

How to use it

1. 1

   Add it to the chart

   The button below opens the terminal with cumulative delta already applied. It plots in its own pane beneath price so the two can be compared bar for bar.

2. 2

   Watch the slope, not the level

   The absolute value depends on where the accumulation began and means nothing on its own. What matters is direction: a rising line is sustained aggressive buying, a flat line during a price advance means the move is happening without it.

3. 3

   Trade the disagreement

   The signal worth waiting for is divergence. Price making a new high while delta does not means the advance is being sold into, and that is information no price-only indicator can give you.

Questions

Also free