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Could not launch compiler

ever since upgrading to MT4 build 203 i have gotten 'could not launch compiler' message. i've had to re-install MT4 for each instance of MT4 i have on my computer. but then it happens again. so far it has occured 3 times and each time i've had to re-install MT4. what gives

Non dealing desk

there is great info on brokers in this forum http://nondealingdesk.com/ there is an interesting discussion on metatrader. here is a recap of one of the posts http://nondealingdesk.com/showthread.php?t=181 1. MT was designed for the dealing desk brokers. You can ask the company itself. 2. Metaquotes

Vertical line color

the following code outputs a red vertical line LineName = TimeToStr(CurTime()); ObjectCreate(LineName,OBJ_VLINE,0,CurTime(),Ask,0,0,0); how do i make it a yellow or other color line

Deleting arrows on chart

How does one delete arrows on the chart with MT 4? I have tried ObjectDeleteAll(0,0) and that deletes the vertical lines but not the buy and sell arrows