If anyone takes TASC magazine there is an interesting article in the Aug issue concerning "Advancing Issues Momentum" (AIM). This is the Advance Issues Momentum indicator, and the premiss is that you choose the stocks that are of interest, so that you don't get all the extraneous noise that the broad market advancing issues provide - you are just measuring those that are of interest.
In this case I have used the largest 20 stocks in the ftse by Mkt cap. To avoid noisy data, the advances are smoothed over a period of 20 days so that a definition of an advance is where price rises above the level of 20 days ago - this is the default period in the system - it may be worthwhile experimenting with other periods. Whilst there is no reason why all 100 stocks could not be included in the indicator, the processing is so slow that my pc becomes unusable if all 100 are used - even 20 stocks seems to slow it down tremendously - probably a feature of the language used in writing the indicator within AIQ.
Looking at the last 12 months, it has been a pretty good indicator when it moves away from extremes i.e. down from above 15 or up from below 5. But not perfect by any means - some of the sell signals last year only showed a consolidation in the advance - but it would seem to indicate that any upside from here could be hard earned.