Need Help - Trade on trade on Daily Chart

Dear All
I am creating a Expert Advisor but i couldn't prog the EA to trade only one trade on Daily chart , My EA it's keep on trading when ever it's Take the profit / Loss .I want to limit the Open trade to open on Daily Chart Time Frame .
(Terminal - Metatrader 4)

Thanks in Advance.

I had the same problem. Here's the answer:

You want to make sure that your code includes something like

if(Volume[0]==1)
{
//put your trade code in here
}

That means that it will only trade if a new bar just opened. So, on a daily chart, it would only trade once/day and not multiple times throughout the day.