A little inside baseball:
Typically, on Butterfly and Condor Spreads, you want to buy or sell the 'wings' against the 'body'.
So, for example, with a Sept20-Oct20-Nov20-Dec20 1x1x1x1 CL Condor spread, to BUY the Condor you would buy Sept and Dec(wings) and sell Oct and Nov(body).
For the...