Problems with mt4 lagging

Does anyone else have problems with mt4 lagging? For some reason periodically during my trading day, mt4 starts to freeze and lag? I thought it was my broker so i signed up to a different mt4 broker just for charting but this is the third time its started happening. Im also running oanda and sometimes fxcm but there is nothing running in the background like msn messenger or skype etc. Just my charts and the odd webpage like forexfactory. I have 4 gig ram and 64 bit OS. Any ideas?

The following can and will have an impact.

SYSTEM
In some (most) cases a 64bit OS will run slower than a 32bit (especially when the program was written for 32bit) Though this shouldnt impact much it can have greater problems with some software over and others.

Correct Drivers for your network card. - and correct settings

Wireless Network - Just dont is the best idea

MT4
Number of open charts

Number of indicators /EAs on charts

Badly written or Simply Processor intensive indicators / EAs

ISP
Your broadband Speed - & Time of Day especially if your on ADSL

Your ISP - They can and do put you on a lower proirity temporaily if you have a high volume of trafic and alot of other users are active.

Your Broker

One little trick on slow computers is to right click on your market watch window and select "hide all" that will stop the datafeed for the charts you are not using and frees up your CPU a bit.

this is also usefull. turn of: -> save deleted charts to reopen
reduce -> number of candles to 5000
then restart MT4 a few times

-> https://apiaryfund.com/forum/mt4-lag-solution