Marking up a live chart

Analysts sketch support levels straight onto a candlestick chart, and a tablet held flat on the desk becomes a paper notebook that updates itself in real time beside the laptop.

Precision beats size

A 10-inch panel with a fine-tip pen is often preferred to a larger screen, because the hand can rest on the glass without covering the numbers being read.

What the next generation adds

Vendors are promising lower pen latency and pressure-sensitive annotation that survives between sessions, though most current models already handle quick chart markup well.