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Is there any way to intercept and pre-process the raw price information before it is processed by a study? This is really a request for a custom filtering callback or facility. Filtering is one application of this, but being able to define a custom price, or custom price filter would be a huge advantage within EFS studies. By the way, I believe InvestorRT's product allows for user-defined custom price filters, although it doesn't have the programming power of EFS JavaScript. Still, it's a great idea, and we EFS programmers should at least be able to define a custom price filter or pre-processor, to feed pricing to studies we instantiate in code, rather than having to code everything manually in order to achieve full control. In particular, I'm thinking of the Parabolic SAR built-in study, which is sensitive to extremes in price, which I would rather be able to filter out.