Jeff, since last year, I've noticed far more price spikes...where the price of a selection suddenly moves in or out by a huge number of ticks, only to suddenly snap back again shortly afterwards.Ferru123 wrote: If you simply rely on mean reversion to kick in at some point, you'll get mauled by the market when it just carries on trending in a particular direction.
Let say's you back at 4.0. What are your exit criteria? Do you bail when the market hits 4.4? How about 4.8? 5.2? 6.0? Or do you just sit back and hope that the market will eventually turn around?
Jeff
The trouble is that if you get caught by one of these price spikes, trying to use stop-loss is going to cost you a lot of money. Say you have an open position, the price starts to move against you... you stop-loss, but it turns out to be a price spike...You can't get back in again because the price just snaps back again so fast and smoothly, and then it goes on moving in the way you predicted all along.
These sudden spikes constitute a nasty psychological attack. It is hard for me to believe it isn't being done intentionally. Whether it's manipulation or not, the fact is, these constant price spikes are very annoying, and render stop-loss very difficult to employ most of the time.
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The view I take is that stop-lossing is actually a form of price chasing (trend following), and if you are chasing prices around (trend following) and its not based on your own independent information about what is happening in the real world (i.e., objective form, commentaries, pictures from the track etc.) , you are very likely to lose money.
For the most part I've come to agree with Peter that its usually always better to oppose price movements. The only time I've ever been able to get away with following trends in horse racing is in very simple markets where only one horse dominates the book. That's the about the only situation that trend following works for me.