About this app

Uses true range rather than high-minus-low so gaps count, compares the 14-day average against the three-month average, and counts narrow-range and inside bars in the last week. Twenty bar ranges are drawn as a column sketch per name with the tight bars picked out. States the one thing compression genuinely supports — volatility clusters and mean-reverts, so a quiet stretch is a reasonable claim about the size of the next move — and the thing it never supports, which is direction.