Needed: Absolute MACD high and low for last 6000 bars

I need to know the MACD high and low for last 6000 bars (the highest and lowest values). I just need it to be stored in a double.

double high1 = (MACD high found in last 6000 bars);
double low1 = (MACD low found in last 6000 bars);

I can't seem to figure it out =(

Hmmmm....maybe you can use MathMax() with a loop?