From Oanda's FAQ:
Can I go long and short at the same time?
It is not possible to hold long and short positions at the same time. We are considering revising this policy, but cannot confirm if and when this will happen. If you wish to simulate this behavior, you are encouraged to open a sub-account under your primary account. To request this, please contact us and include your username and account ID in you request.
Correct me if I'm wrong. How do you plan to implement your system with these restrictions, or is it just theoretical?
Can I go long and short at the same time?
It is not possible to hold long and short positions at the same time. We are considering revising this policy, but cannot confirm if and when this will happen. If you wish to simulate this behavior, you are encouraged to open a sub-account under your primary account. To request this, please contact us and include your username and account ID in you request.
Correct me if I'm wrong. How do you plan to implement your system with these restrictions, or is it just theoretical?