Don't take trade on first bar

[ianwaugh@xxxxxxxxxxxxxxxxxxx (Ian Waugh)]

Can anyone help with this? I'm using TS 4.

I'm fiddling with an intraday system using 5 min bars and I'd like a 
condition that allows me to prevent it taking a trade on the very first 
bar of the day, mainly to avoid taking a trade if the open gaps from last 
night's close.

The code is currently:

if condition... then buy at bbb stop;

I've tried the LastCalcTime function:

if condition and LastCalcTime<>1600....
    the time of the close of the last bar the previous day

But it simply prevents *all* trades.

Is there an easy way to do this?

Cheers,
Ian