I have 2 algorithms trading paper live on Quantopian and they cause a negative cash position. Not by much (19$ over 10K) but the problem is that if that happens at IB and you trade a cash account, the entire transaction will be refused.
Target percent with 100% should never cause a negative cashposition.... I think.... or does the buying algo allow this? If it does it should be tweaked so its only buying up to 0 and not more.
Any thought of the Q's?
The "order_target()" functions make their calculations based on the number of filled orders, and don't consider the status of open orders. Take a look at this thread for a more detailed example: https://www.quantopian.com/posts/order-target-percent-sid-1-causes-negative-cash-dot-dot-dot
We're aware this is non-intuitive! So we're working on API changes to bring the functions in line with expectations.
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