* the first two charts provide a solid perspective for the 2009 to 2011 relevance of the NYSI:
880 and 350 horizontal levels
* an institutional services organization called Ned Davis Research (NDR) provides some research detail about the actionability of the 40 and 55 horizontal levels I have selected to show in the lower portion of this second chart which displays SPX internals
this third chart is:
* I have used this "relative TICK chart" - 1min TICK closes to the 1min SPX closes ratio - for a few years and have shared it at the Main Board at www.technicalwatch.com a few times over the years with some explanation about how "TICK fulfillment" works with the price action
it will be apparent to you how this chart progresses in the future to provide signals which can be reliable
it does require some depth of experience in using this data for actionability to actual trading