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Re: Strategies testing. Datafeeds differ a lot



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Gary Fritz wrote:
> 
> > My experience is that market orders in the emini-SP usually have 0.5
> > slippage on each side. On the other hand, my experience with emini-SP
> > stop orders is that they usually have no slippage at all.
> 
> If I'm not mistaken, a stop order **IS** a market order (actually
> a limit order, since Globex doesn't support "real" market
> orders), the instant the stop price is hit.  Your market order
> should be identical to the market order resulting from a stop
> being hit.
> 
> If you're seeing differences in slippage between your market
> orders and your stop orders, it's probably due to the slight lag
> between price X trading in the market, price X showing up on your
> screen, you hitting the button for your market order, and your
> order reaching the market.  E-mini prices often move fast, and it
> wouldn't take much of a lag to increase your slippage.

Gary, I guess you're right. Now that you mention it, there was in fact a
discussion here in O-list about the way stop orders work in Globex.

Regards, MT