// Let time frame start when Event == true
// f.i. frameAlign(hour() == 0); aligns to midnight
function frameAlign(BOOL Event)
{
	TimeFrame = 1;
	vars Num = series(0); // use a series for storing Num between calls
	Num[0] = Num[1]+1;    // count Num up once per bar
	if(!Event) 
		TimeFrame = 0;      // continue current time frame
	else
	{
		TimeFrame = -Num[0]; // start a new time frame
		Num[0] = 0;          // reset the counter	
	}
}

function run()
{
	BarPeriod = 5;
	TimeFrame = 12;
	frameAlign(minute() == 0);
...

// Workshop 4: Trend Trading ///////////////////
#include <profile.c>

function run()
{
	BarPeriod = 60;

/*
	BarPeriod = 5;
	TimeFrame = 12;
	// create a top-of-the-hour-aligned price series
	static int numBars = 0;
	numBars++; // count the number of bars per hour
	TimeFrame = 0; // during the frame
	if(minute() == 0) { // top-of-the-hour
		TimeFrame = -numBars; // end the frame
		numBars = 0;
	}
*/

	vars Price = series(price());
	vars Trend = series(LowPass(Price,1000));
	vars Signals = series(0);
	
	Stop = 4*ATR(100);
	
	if(valley(Trend)) {
		Signals[0] = 1;
		if(Sum(Signals+1,3) == 0)  // no signals in the previous 3 bars?
			enterLong();
	} else if(peak(Trend)) {
		Signals[0] = 1;
		if(Sum(Signals+1,3) == 0)
			enterShort();
	}
	
	PlotWidth = 600;
	PlotHeight1 = 300;
//	plotTradeProfile(50);
	set(LOGFILE); // log all trades
}

If multiple time frames and different trade time offsets are not required, set the time frame with BarPeriod only. This uses the lowest possible number of bars and results in the highest speed for testing and training.