MarketDataRequest

Field	Type	Description
`reqId`	`int32`	Unique request identifier used for tracking across EWrapper
`contract`	`Contract`	Contract object containing defining characteristics for ticker.
`genericTickList`	`string`	Comma separated ids of the available generic ticks
`snapshot`	`bool`	Indicate that a snapshot should be requested rather than a data stream.
`regulatorySnapshot`	`bool`	Set to True for a paid, regulatory snapshot or False for live data
`marketDataOptions`	`MarketDataOptionsEntry`	Internal use. Unique attributes for market data request.

MarketDataRequest.MarketDataOptionsEntry

Field	Type	Description
`key`	`string`
`value`	`string`