diff --git a/AO.txt b/AO.txt
index f5dfca9..b2862ef 100644
--- a/AO.txt
+++ b/AO.txt
@@ -1,3 +1,4 @@
+//@version=3
 ////////////////////////////////////////////////////////////
 //  Copyright by HPotter v1.0 15/04/2014
 //    This indicator is based on Bill Williams` recommendations from his book 
@@ -31,4 +32,4 @@ xSMA1_hl2 = sma(hl2, nLengthFast)
 xSMA2_hl2 = sma(hl2, nLengthSlow)
 xSMA1_SMA2 = xSMA1_hl2 - xSMA2_hl2
 cClr = xSMA1_SMA2 > xSMA1_SMA2[1] ? white : orange
-plot(xSMA1_SMA2, style=areabr, linewidth=1, color=cClr)
\ No newline at end of file
+plot(xSMA1_SMA2, style=areabr, linewidth=1, color=cClr)