Nullkik

In the context of this incident, the term "Nullkik" refers to a specific edge case in our ticker plant handler. A "Null Tick" is a heartbeat or status message that contains no tradeable data. However, due to a logic error introduced in version 2.4, these messages were treated as valid trade ticks.

This logic failed because tick.price was null . In the Python environment, the comparison None > 0 throws a TypeError , which was not caught by the generic exception handler.

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if tick.price > 0: process(tick)

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