DDE Server - Getting Market Data - High CPU Usage Issue

Hi,

I am in the process of building a DLL based DDE server for use with Metatrader. What options are available to get MT market data other than being in a tight loop in a script which pushes CPU usage quite high ?

Other options considered:

Using an EA / Indicator - The problem here is that they 'fire' only on new tick of the relevant instrument in the chart attached, whereas my server should be publishing rates for many instruments.

Any advice / comments on this at all ?

Thanks in advance,

TheGeneral.