Block Trades

A block trade is an unusually large print relative to the symbol's normal activity. BlitzPulse flags these as context because size can change how a move should be interpreted.

What Counts As Unusual

The same print size can mean different things for different symbols. A trade that is ordinary for SPY may be extreme for a thinly traded small-cap stock.

BlitzPulse evaluates block activity against symbol-specific context, such as:

  • recent average trade size
  • notional value
  • relative volume
  • volatility regime
  • time of day

What It Can Suggest

Large prints can point to meaningful participation, especially when they occur:

  • near a volume profile level
  • during a breakout or breakdown
  • after a long consolidation
  • with confirming price and approximate CVD behavior

What It Does Not Prove

A large print does not automatically mean informed buying or selling. It may be portfolio rebalancing, hedging, market making, delayed reporting, or a negotiated transaction. Direction and intent are uncertain without more context.

How BlitzPulse Uses It

Order Flow Insights treats block trades as one ingredient in a confluence score. The system should prefer repeated, context-aligned activity over a single large print.

Practical Guardrails

  • Compare size to the symbol's own history.
  • Avoid overreacting to one print near the open or close.
  • Look for confirmation from price structure and risk context.
  • Keep position sizing independent from any one order-flow clue.

Related Concepts

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