Market data entitlements, symbols and expiries

Data entitlements

An entitlement opens per exchange, not per product

What a missing entitlement looks like

Real time, delayed and history

Delayed data is a trap of form, not content

How a symbol is written

Why the exchange is part of the symbol

A symbol you are not subscribed to receives nothing at all

Tick size, tick value, currency

Not all twelve months trade

Choosing the right expiry

Rollover timing

What a source declares it can serve

Why a symbol stays empty

Why two views disagree

Quick diagnosis