0.005 * displayed timespan, so for example more than once every hour for the 7d chart. If it's an issue I can make them more up to date.
On
BitcoinMoxy we display all 4 time spans next to each other:

And it shows a different latest price for each above the chart.
Is it possible to update the latest numbers (price/%) for all charts at the same time, maybe every 5 minutes, even if you want to avoid re-rendering the graphs for the bigger time spans as often? So that the numbers on all charts reflect the latest possible price.