addIBslot: Create a twsContract and store it in a slot of an instrument
In gsee/twsInstrument: Improves ease of use of IBrokers and FinancialInstrument

Description Usage Arguments Details Value Note Author(s) See Also Examples

Creates a twsContract object, and slot in the corresponding instrument, and places the object in the slot.

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addIBslot(symbols, sectype = "STK", exch = "SMART", primary = "",
  expiry = "", strike = "0.0", currency = "USD", right = "",
  local = "", multiplier = "", include_expired = "0", conId = 0)

`symbols`	vector of character names of FinancialInstrument instruments
`sectype`	type of security
`exch`	exchange
`primary`	primary exchange of security
`expiry`	expiry
`strike`	strike price
`currency`	requested currency
`right`	right
`local`	local security name
`multiplier`	contract multiplier
`include_expired`	should expired contracts be included
`conId`	IB contract ID

This is an old function that is not terribly useful anymore. It should probably be deprecated It is essentially a wrapper for twsContract, but it doesn't check to make sure the twsContract is valid.

The instrument must be defined before calling this function.

adds twsInstrument class to the instrument

Called for it's side effect

TODO: create instrument if it doesn't already exist

Garrett See

see instead: twsInstrument twsContract, instrument

## Not run: 
currency('USD')
stock('XOM','USD',1)
addIBslot('XOM')

# This is BETTER:
stock("CVX","USD")
instrument_attr("CVX","IB",getContract("CVX"))
# the above will add the twsInstrument class
# if you have FinancialInstrument version 0.7.2 or greater

# So is this:
twsInstrument(stock("BP","USD")) #will update other details of instrument by default

## End(Not run)