CommType Field
Valid values:
1 = per unit (implying shares, par, currency, etc)
2 = percentage
3 = absolute (total monetary amount)
4 = (for CIV buy orders) percentage waived cash discount
5 = (for CIV buy orders) percentage waived enhanced units
6 = points per bond or or contract [Supply ContractMultiplier (231) in the <Instrument> component block if the object security is denominated in a size other than the industry default - 1000 par for bonds.]