[amibroker] CCT Kaleidoscope

[Bob Waits]

I came across the formula below. Any suggestions on how to write a "BUY" and 
"SELL" signal if the indicator crosses zero. Thanks.

/* CCT Kaleidoscope
**
** Originally developed by Steve Karnish 
** http://www.cedarcreektrading.com
**
** AFL translation by Tomasz Janeczko
**
** Set scaling: Automatic
** Grid: Middle
*/

Graph0=LinRegSlope(C,13) 
+ 100 * ( EMA( EMA( C - Ref( C, -1 ) ,34 ) ,21) 
/ EMA( EMA( abs( C - Ref( C, -1) ),34 ), 21 ) ) 
+100 * ( EMA( EMA( C - (0.5 * ( HHV(H,13) + LLV(L,13))),21),3) 
/ (0.5 * EMA( EMA( HHV(H,13) - LLV(L,13),21),3 ) ) );