Jeff asked for a chart of UltraShort Financials ProShares (AMEX: SKF) in the comments. You can see here that there wasn’t much action for our simple example system on SKF today… during a lot of the down move, the volume pressure was to the upside. I suspect that sometimes the arbitrage on ETFs will skew the volume pressure. Nevertheless, we made 2 trades for +$1.37 per share.
Here is the chart:
