My trailing-stop-sell has gone up in target price by $0.1385 since yesterday. The trailing stop has gone up 6.925% since yesterday. Based on the entry price of $4.33712/$4.40606, for that increase to be correct, we would have had to have hit a price point of $4.63747/4.71118 at some point in the past day. We have never come anywhere near $4.60 during this time frame, and in fact we've pretty much been down from the starting point since I entered the trailing stop. Thus, I have to conclude that as I noted earlier, trailing stops are not working properly and should be avoided until Zhoutong fixes the problem.
Your calculation is different than Bitcoinica's because it seems Bitcoinica does on a pip per pip change and you are calculating by the percentage pip change.
Since you were doing a Trailing Stop sell yours calculation was:
4.33712 * .006925 = 0.3003456
0.3003456 + 4.33712 = 4.637466
But on Bitcoinica it would really be based only on the pip movement of the Sell side.
For example, I followed the 4 changes in my Trailing stop (on the sell side). Over the course of ~10 minutes it changed,
4.2439 to 4.2496 to 4.2498 to 4.2499
The sell bid changed:
4.33257 to 4.33825 to 4.33829 to 4.33854
If we take the difference between the bid price and the trailing stop orders we get:
0.08867, 0.08865, 0.08849, 0.08864,