chart updation depends on system speed.
main requirement of trading system is SSDE hardisk.
remove all special effects in your windows settings and set it for performance.
in power management make CPU 100% min usage.
open less symbols,load less number of days in the chart.
you can select even zero days.
use market analyzer to load data.
set ninja trade high priority.
if your system is slow close browsers
remove all unnecessary softwares running in startup.
use JETCLEAN software to clean your system
i am running even on 12" ATOM cpu based laptop.
you try all these you will get proper updation
reduce chart updation to one second.
if you extracting the data reduce to one second.
dont run unused charts in back ground . minimize those charts.
even if your delay in data inform me i will tell some more tips