If you are trading longer term, sell a mini dow call option above the market and use the proceeds to either buy a put or part buy the put below the market, the put giving the stop protection with little cost and a lot more flexibility. Granted you lose the opportunity profit above the call strike if the market should rally..
You can hedge 5 lots of mini Dow with 1 of the new big Dow (DD) contract that started trading today, although liquidity may be an issue. Should be interesting to watch the two trade together for a while.