Most important feature, SERVICE:
Sierra - very good.
Medved: Outstanding! Only pipped out for service first place by Wealth-lab . (buttontrader is champion - but is a frontend)
Pivot points:
Sierra - I gave up on plotting pivot points. Apparently it can be done if you open 3 charts, do this that and something else, but after 3 hours I was still having hassles.
Medved: one right click, one left click and pivot points are on the chart.
Overlay one chart on another:
Sierra, about 3 clicks. But not much adjustment, so slightly untidy on the chart.
Medved: can't be done. but they have a snyc button which automatically puts both charts at same time etc. making them easy to compare.
hope they can add an overlay at some stage.
Medved can be hooked into wealth-lab - which makes for a reliable IB feed to WL.
Overall I like both programs and as they are both so cheap I will run both - from the same IB feed (yes, it can be done easily).