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Is there syntax to scan for a volume change greater than the previous X sessions or a single or group of sessions within a specified previous number of days, expressed as a % of difference. A couple of examples: stocks with a daily session volume at least 200% greater than the previous 30 days; or [same except] a daily volume 200% greater than any of the others in the last 30 days (so that if three days ago there was something more than double anything in the last 30 days, including the two days since that volume spike?). As far as I can tell, the volume scanning capability is just raw volume, which will be much higher for a large cap than a small cap. A change in % of volume would be nice to detect. Thanks.
[type = stock]
and [volume > sma(21, volume) * 2]
and [exchange is NYSE]
and [group is EnergySector]
I picked energy sector because it has the lower relative strength of the sectors compared to the SPX. Turned up three stocks, only one showed any promise. http://schrts.co/efrESD