Foundation.Every portfolio on this site is an output of a measurement, and the measurements are more interesting than the portfolios. So they go here, with the numbers, the dates and the method attached.
Four samples a day since 1 August. The expensive window turns out to be a weekday night, the weekend is the cheap one, and Broadcom is not following the clock at all.
Read it →Nobody asked us to check. We quoted every one against live markets at three order sizes, and the answer changed which portfolios exist on this site.
The measurements come from scripts in the repo, not from a spreadsheet someone kept. They quote live markets at three order sizes and write the result to a file the site renders directly, which is why the map has a timestamp on it and why the numbers move between runs.
See the whole map ›