Broadway, I do it more specifically when a US report is out.
Say for example the other day when US employers added less jobs than expected, the market was quite till the report released, and once it did the Dow started getting hit.
The great thing is the Dow is so liquid and takes hours to go -200/-300 (it ended down -248 that day), and the Aussie200 which trades at that time lags, and its easy to catch on.
So basically - payrolls released, DJIA streams down slowly, the Aussie200 starts reversing to -10, I short with a 40 point stop-loss, the Aussie200 ends down 100 points at the close of a session, free $100 if you short 1 contract.