High (H)

Close (C)

Low (L)

Res3 = 

H + 2( Pivot - L )

Res2 = 

Pivot + ( H - L )

Res1 = 

( 2 x Pivot ) - L

Pivot = 

( H + L + C ) / 3

Sup1 = 

( 2 x Pivot ) - H

Sup2 = 

Pivot - ( H - L )

Sup3 = 

L - 2( H - Pivot )