[amibroker] Help with TimeFrameSet

[GMAN795]

I've got a weekly system that I'm backtesting but would like to enter the day 
after a 4% gain from the previous day.
Is this the proper code?

TimeFrameSet(inDaily);
ROC_4 = roc(c,1) > 4;
TimeFrameRestore():

buy = TimeFrameCompress(ROC_4,inDaily);
      AND EMA(c,10) > EMA (c,30)
      and Volume > ref(v,13),-1);

I then have a trailing stop based on a weekly ATR.

Thanks