Vix and More tiene un post sobre la creación de gráficos (hacer gráficos)
For starters, creating charts is easy. Making charts that tell a compelling story only requires a little bit of insight and effort. Sometimes the best way to make a interesting chart is just to look at a bunch of them until one of them jumps off the page and forces you to take notice.
Sitios para hacer gráficos:
www.freestockcharts.com (gratuito)
www.freestockcharts.com (por suscripción, pero hay opciones gratuitas)