Quote from: stochastic on February 22, 2012, 03:24:00 AM

Quote from: trogdorjw73 on February 21, 2012, 11:32:09 PM

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,

Even if it's based off the value chance rather than a percentage change, it's still not working right. My original entry price was $4.33712/$4.40606, with a trailing limit at $2.00. For the trailing limit to now sit at $2.1385 then the Bitcoinica price would have had to hit $4.46/$4.53 or so, and at least looking at the time range it never went anywhere near that high. But now we've had some more movement, so let's re-evaluate.

Currently, my trailing limit stop sell is at $2.2734, an increase of $0.2734 from the original price. Have we come anywhere near $4.50/$4.68 on Bitcoinica during the past day? I guess it's possible, with large movements, but I'll leave my order in to see what happens over the course of yet another day. I'm still pretty sure it's moving every time there's a noticeable change in pricing up, not taking into account the original price.

Edit: Seems to be holding as my limit stop sell is still at $2.2901 after all the recent movements. I'll leave it up more to verify, but it looks like my main error was in assuming it was percentage based rather than absolute values.