Ok, once I can deposit BTC, I'll put up an offer for lending them for 1 day - then you can reserve to borrow them and a few seconds/minutes later try to open a 1 day position with these...
the minimum amount of time for a position is 1 day and that loans are used by traders that dont reserve the funds but they go directly on the spot market when open the position, 1 day loan offers are used but not via the reserve system