I can provide an example qvw, but it will have to wait until next week. It will take a while to "clean" the existing chart as it is used commercially. Meanwhile, I am not sure what to answer yet; is for me to explain how to use this type of chart (qv_testing, different thread) or how to build It (Paul) or how to get the reference lines fit the bars (Paul). Please be a bit more specific, so I can give you the answers you need. I am happy to.