On the chart
Blue for what traded at the offer, red at the bid, with circle size following volume.
A two-hundred-contract trade and a two-contract one count the same in the bar's volume. This separates them: it marks the large ones at the exact price they executed, sized to match.
Not at the foot of the chart or in a separate list: at the coordinate where it happened. So you see whether the big money went in high, low or mid-range.
The single tick that is already large, the burst that adds up fast, and the running total per price inside the bar. A sliced order never shows up the first way.
The bar can be set in contracts or in multiples of the usual volume, which is what makes one setting work across different instruments.
The names the indicator uses, and what each one means.