Need some help with Trig for new indicator

I cannot seem to figure out how to calculate two angles for comparison. . . Can anyone here help ?

The goal is to calculate two angles, one long, one short. based on the following three points.....

Long
pA = High (Symbol(),0,16);
pB = High[iHighest(Symbol(),0,MODE_HIGH,16,1)];
pC = High (Symbol(),0,1);

Short
pA = Low (Symbol(),0,16);
pB = Low [iLowest(Symbol(),0,MODE_LOW,16,1)];
pC = Low (Symbol(),0,1);

I understand the trig but cannot seem to figure out how to get MT to return the correct value.

Comparring the angles is a usefull tool for determining market direction and Overbought.Sold oppourtunities.....


Please help

Oh yeah I forgot, I need the current value and previous value for comparrison....

The simplest way is to use the inverse sine functions MathArcSin:
http://docs.mql4.com/math/MathArcsin

e.g. suppose you start period P0 with high H0 and low L0, and want to find the angle between the high H1 made at period P1 and H0, and the low L2 made (at the same or different time P2) with L0:

Calculate the high angle:

HA = MathArcSin((H1-H0)/MathSqrt(MathPow(P1-P0,2)+MathPow(H1-H0,2));

Calculate the low angle:

LA = MathArcSin((L2-L0)/MathSqrt(MathPow(P2-P0,2)+MathPow(L2-L0,2));

angle_diff = (HA-LA);

if you want degrees rather than radians, multiply the result by 180/Pi
where Pi = MathArcCos(-1.);

added - note that the angle will change as the period changes. You may want to treat P in some sort of absolute terms, like minutes, or the Time() value, if you want consistency across time frames.

Cheers;
CB
PS - I haven't acully tried the code above, so it may have syntax errors. PM me if you have any questions, if you like.

I cannot seem to set the correct x value to the points.

3 points A,B,C where

Ay = High of the Start Bar
By = Highest point of the period
Cy = High of the current bar

But to calculate the angles I need "x" values of these points as well.

Ax = Start Bar (0)
Bx = Bar that the highest point was reached (1-16) // this one it the problem
Cx = Current Bar (16)

Thanks for your Help...

Hi Kurka;
I just PM'd you on that, let me know if that's what you are looking for.
Cheers;
CB