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Data Types

The TOP feed provides the same messages as the Cboe US Equities TOP feed but in a JSON format. Within the JSON format the following format is used for each data type.

  • Numeric fields are a string of ASCII digits that can be converted to an integer.
  • Alpha and Alphanumeric represent one or more printable ASCII characters.
  • Price is a string of ASCII digits that can be converted to a floating point number. For example, the floating point number 12.34 is represented as 12.34.
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