Charting and Studies User Guide - CQG.com

Accumulative Swing Index (ASI)
Page 211
The Accumulative Swing Index is a cumulative total of the Swing Index. According to J. Welles
Wilder, the Swing Index seeks to isolate the "real" price by comparing the relationships
between the current prices (open, high, low, close) and the previous period's prices. Wilder
used this index as the basis for a trend-following system.
The formula for the Swing Index is as follows:
⎛ C2 − C1 + 05 . *( C2 − O2 ) + 0. 25*(
C1 − O1
) ⎞
50 * ⎜
⎟ *
⎝
R
⎠
where:
K = the largest absolute value of:
L = Value of a limit move in one direction (use CSpec or the exchange’s Web site to look up this
value)
O 1
H 1
L 1
C 1
O 2
H 2
L 2
C 2
= Previous Bar's Open
= Previous Bar's High
= Previous Bar's Low
= Previous Bar's Close
= Current Bar's Open
= Current Bar's High
= Current Bar's Low
= Current Bar's Close.
To obtain "R", first determine the largest absolute value of:
1)
H2 − C1
2)
L2 − C1
3)
H −
L
if 1) is the largest,
R = H − C − 0. 5*
L − C + 0.
25*
C − O
2
if 2) is the largest,
2
1)
2)
2 2
H − C
L − C
1
1
2 1
2 1
R = L − C − 0. 5*
H − C + 0.
25*
C − O
if 3) is the largest,
2
2
1
1
1
1
1
1
K
L
Charting and Studies User Guide