I've spent some time this weekend experimenting with the Swing Signal screen that we use in the Alert HQ software. I have made two changes that have resulted in a smaller but more robust set of swing trading signals. We still use the basic concept of stocks exceeding their upper or lower Bollinger Band and then reversing back inside the Bollinger Band envelope. The problem with this approach is that in some cases, the initial trend is still intact despite the fact that the stock is back inside the Bollinger Band envelope. In other words, the expected reversal is probably not occurring. To improve our results, we have made the following two changes: We have added a calculation of Williams %R to confirm that the price is really turning up in the case of BUY signals (coming out of an over-sold condition) or that the price is really turning down in the case of SELL signals (coming out of an over-bought condition). We now require that the most recent closing price be higher than the pr...