My short order at 315 didn't match, even though there is a margin call order whose call price is 318. My short at 310 did. The lowest margin call's price is at 310. So I put a new short at 311. It didn't match.
=> So, new interpretation : the margin price with the lowest indicated "call price" must be covered first at this call price ? Regardless of the 10% above the feed price thing ?
I know that most people here don't actually try to use the market and don't want to short, but come on, this market is our product, its inner workings must be crystal clear.