Quick Questions regarding comissions

GuacheSuede

How may I set commissions/transaction costs based of no. of shares ?

How does backtrader differentiate between a short sell and long that checks how it applies the interest parameter from .setcommission ? (in realation to when i use the self.sell() method, how is it different from a normal sell, does backtrader keep track of previous positions/trades to perform the short operation ?)

Thanks for your time.

backtrader

This is all done with CommissionInfo objects (which can be quickly set via the broker or permanently customized with subclasses)

@guachesuede said in Quick Questions regarding comissions:

How may I set commissions/transaction costs based of no. of shares ?

It is the standard mode. Choose if it is a percentage based commission or an absolute value one.

@guachesuede said in Quick Questions regarding comissions:

How does backtrader differentiate between a short sell and long that checks how it applies the interest parameter from .setcommission ?

See the documentation for Credit above.

@guachesuede said in Quick Questions regarding comissions:

in realation to when i use the self.sell() method, how is it different from a normal sell

There is no special and normal sell. There is only one. The CommissionInfo schemes control what happens.

@guachesuede said in Quick Questions regarding comissions:

does backtrader keep track of previous positions/trades to perform the short operation ?

backtrader keeps track of trades and positions. You are notified via notify_trade and you can always get the current position with getposition

Docs - Strategy

GuacheSuede

@backtrader Thanks for the reply. May i ask how do i get a list of buy/sells made ? Or must it be manually managed ?

backtrader

You are notified of order execution in notify_order. Keep a reference to those that are interesting for you.