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Stock Trading Halts strategy

Does any know about this strategy and the basis for its use. The strategy as I understand it a day trading type strategy that is used as an indicator for short term buy or short sell opportunities that take advantage of substantial increase in volume and volatility based on significant news.

I have found several services touting this as a day trading strategy and I am looking for more information on trading around stock halts as well as whether there is a solid basis for this strategy. If any one has used any of the information services around this strategy I would be interested in hearing about their experiences.