Change Tables
A Change Table is the mechanism by which MarketGrid stores entities for distribution as market data. They are essentially a version of the given entity record as at the time indicated in the Timestamp attribute. Each record has all the foreign key data converted from the internal shared memory indexes used within the Trading System to the external Symbol attributes that are persistent over time.
Each Change Table relates to an entity in the model as indicated by the name of the Change Table which is of the form