- Lean engine will automatically add an options underlying if not
present, but in most cases the option chain will select the underlying
too, so let's make sure the configurations match. Previous to this
change 'fill forward' setting could be different causing the
underlying to be duplicated in the data stack
* Add support for Null SecurityPositionGroupModel
- Add support for algorithms to set the null security position group
model which will not group securities together but rather return the
single group buying power model. Adding regression algorithms
* Add Null Margin python regression & cleanup
- Add python regression algorithm & minor regression algorithms clean up
* Fix multiple option strategies liquidation
When holding multiple position groups of the same underlying, reverting
one of the groups was not possible because of the presence of the other
position groups, which caused no matching groups to be formed for the
order.
* Make OptionStrategyPositionGroupResolver not group single position
* Revert make OptionStrategyPositionGroupResolver not group single position
Martin-Molinero