Contest with Range Bar, Renko, Tick, Mean Renko

#property indicator_chart_window
#property  indicator_buffers 2


/** Do not modify start() function.
 * Modify "mainValue()" and "expires()" functions.
 */
int start() {
        double ind_buffer1[1];
        SetIndexBuffer(0,ind_buffer1);
        double ind_buffer2[1];
        SetIndexBuffer(1,ind_buffer2);
        ind_buffer1[0] = mainValue();
        ind_buffer2[0] = expires();
       
        return(0);
}


/** The returned value is schedule of the next recalculation
 */
datetime expires() {
        datetime nextCheck = 0;
        // some calculation, e.g. update in 24 hrs
        nextCheck = TimeCurrent() + 24*60*60;
        // end of calculation
        return(nextCheck);
}


/** The returned value becomes the main control of the offline chart
 * (step points, brick points, range points, volume ticks)
 */
double mainValue() {
double value = 0; // result value initializes
// some calculation for value, i.e.
value = 300;
// end of calculation
return(value); // returns computed range value in points        
}