A graph often hast min and max peaks. If i watch one with time range 1h, it hast a maximum (shown) of 90 (example). if i watch the same item with time range 1week, the drawn max is only 80 while the legend says max: 90.
suggestion:
When fetching data to print into the graph, watch for min / max peaks and make zabbix regard them when printing the graph. So the week/month/etc graphs become more meaningful.
suggestion:
When fetching data to print into the graph, watch for min / max peaks and make zabbix regard them when printing the graph. So the week/month/etc graphs become more meaningful.

