Cumulative delta is called Delta Day within MarketDelta and is a display option within the Volume study.
- With a chart open, right click and choose Add Study.
- At the top, choose All to see all the studies then choose Volume.
- Before clicking Add, click Setup and choose Delta Day in the highlight column.
- Click Add to add it to the chart.
Here is what it will look like on the chart (bottom section).
To view cumulative delta as candle bars, see this blog post and video.