deego: The 10% figure was not for the amount of loss but it was the chance of a losing trade.
If there's a 10% chance of losing a trade, doesn't that translate into a 90% chance of winning a trade? I'm confused (which isn't unusual, so please be patient with me). I'm guessing this has to do with some negative aspect of laddering down against a trend. And, I can relate to that (was clobbered for about $20K laddering down with e.g. Copper Mountain, Talarian, etc, during the dotcom bust in Aug-Sep 2000, which was subsequently more than made up for with physical gold/silver in 2001).
But, here, I think bitcoin is somewhat different since it's the only thing being traded. If it tanks like the dotcoms, then pretty much everyone playing this game is hosed except those on the short side because the whole game is shit-canned. Then again, those on the short side have taken some right-powerful punches over the last couple months.
I have about $5K in this. Starting with $500, and piling on (laddering down) from wherever it was (can't remember, but 12ish to 18ish, or thereabouts) many months ago. I'm now about $213 on the plus side after putting much more than I'd originally wanted to into this game :-) out of the same stubbornness that got me into trouble back in 2001. So, yeah, I'm not saying this "strategy" is perfect, or even good. Rather, simply that it's been OK for me thus far over this time frame with this particular commodity.