Not to deny that the OP made a mistake that an experienced person would avoid, but why is the OP's mistake greater than that of the person who willingly sold at $.20? Yet the OP bears 100% of the loss, and then some.
The OP's experience highlights a critical problem with the existing bust system: You can't know that a trade was at a "bad price" until after the fact. If you could, the trade wouldn't have occurred in the first place, QED...
There are no rules as to which trades, specifically, are bustable, and which are not -- only "guidelines" (I guess Jack Sparrow was right

). This is a nontrivial risk for any short-term market participant, and probably contributed to some of the bigger houses pulling their bids/asks when things went screwy on Thurs. (No one knew ahead of time that the cutoff would be 60%. Try finding that in the "rules"

)
That said, things have improved a lot over the last few years as they've streamlined the "clearly erroneous" guidelines.
But ultimately, the trade bust system is an anachronism that screams for replacement with something better and more fair. The "individual stock circuit breakers" idea now being developed between the SEC and the exchanges is, in my opinion, a step in the right direction:
http://finance.yahoo.com/news/SEC-E...5.html?x=0&sec=topStories&pos=1&asset=&ccode=
I think they also need to ban market orders entirely (my guess is that the seller at $.20 used a market order); market orders simply don't make sense in the context of today's markets, and a lot of this sort of pain/regret could be spared if everyone were required to enter
some price beyond which they don't want the trade.