Quote from J.Joseph:
Hopefully that wasn't your entire account on the line. But when I place stops on options, I always do limit orders, even if the limit is not near my stop. Like, the order goes through if price is below X, but I won't accept less than Y amount for the option. So, for this trade, set a stop if the price goes below 6.8, but have a limit of 6.6, so even in a very fast move you'll get no less than $6.60, and in most cases $6.79 or $6.80.
Quote from ForexForex:
No stops. And to reduce your risk you could sell the GLD Sep 2011 170.00 Put for about $4.50 - or whatever the bid was at when you bought the 175 puts.
This would be a Debt Spread
Quote from probe1957:
There is very little risk now that I am stopped out of the trade.![]()
Quote from ForexForex:
Yes I'm aware that you got stopped out. Based on the 175 puts being bought at $10.50 the 170 puts probably could have been sold for $7.00 when you bought the 175 puts. Maximum risk $350.00, maximum profit $500.00 - no risk of getting stopped out early.
Something to consider for future trades.

Wow, one phone call and resolved, I must say I am impressed. One important thing a broker must have is to quickly resolve & reimburse for mistakes, it seems TDA does a great job in that regard. I know some brokers would have given you hell untill you see a credit from them (especially if they are the MM themself..)Quote from probe1957:
A follow up.
I just got off the phone with TDA customer support who checked with a market maker who determined it was some kind of error. They are going to credit my account the difference between where the order actually triggered and where it should have triggered.
So my account will be credited $458. Not a lot of money but it is a lot when it is mine.
Once again, my thanks to everyone who responded.