Learn · Order Flow
Delta
The difference between buying volume (at the ask) and selling volume (at the bid). Cumulative delta reveals which side truly dominates.
Delta compares volume executed on the buy side (at the ask) and the sell side (at the bid). A cumulative delta rising while price stalls signals quiet accumulation; a price/delta divergence often precedes a reversal.
Example
Price makes a new low but cumulative delta makes a higher low → bullish divergence.
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