Conventions

Rules shared by the pages of this manual: how instruments are written, query ranges, and what failed or unsupported calls return. Function pages describe only what is specific to the function; the common ground is collected here.

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Name	Description
Symbols	Functions of exchange objects specify an instrument with the string parameter symbol.
Failures and null values	When a function of an exchange object, or most global functions, fails (network error, timeout, the exchange rejects the request, a parameter the exchange does…