Recently in an International conference named Int.Conf on Financial markets and Corporate finance organized by IIT - Madras, i have been given the chance to be a discussant of a research paper. The paper titled "Range based Mean reversion" dealt with the limitations of available mean reversion ratios like Variance Ratio and drafted a new measure named "Expected lifetime range ratio" and claimed superior to variance ratio. It was interesting to find such attempts. What is your opinion about this?