So, I took all these terms around the % of this and that and applied them to both the old and new ways of 2x and then 3x collateral. Some of the confusion is that 150% number pops up in two different language ways to describe the call price. So, i was getting those two confused thinking the 150% couldn't be correct for both 2x and 3x collateral. So, typed it all out as follows.
Price/Feed = 50 BTS = 1bitUSD
Short 1 bitUSDOld Way 2x Collateral
Collateral 100 BTS
Collateral % 200%
Actual Call Price 75 BTS
Actual Min Collateral % 133 (or 75% , 1.33*value = collateral, or .75* collateral = value , same thing)
150% of orignal price 75 BTS
%75 of Collarteral 75 BTS Collateral drops to 150% of short requirement a.k.a requires 66% of collateral to cover 67% (Wrong) New Way 3x Collateral
Collateral 150 BTS
Collateral % 300%
Actual Call Price 100 BTS
Actual Min Collateral 150% (or 66% , 1.5*value = collateral, or .66 * collateral = value , same thing)150% of orignal price 75 BTS (Wrong)
%75 of Collarteral 75 BTS (Wrong)
Collateral drops to 150% of short requirement a.k.a requires 66% of collateral to cover 100 BTS
As a summary, the collateral amount went from 2x -> 3x and the forced cover happens sooner going from 75% -> 66% of total collateral is now the threshold for a forced cover.
Also, the most recent bitshares client in the help section has an incorrect example about the margin call price. It's an example that is using the old 2x collateral method.
This example needs to be updated.