need help to understand amibroker AFL

[sudhirgudwani]

hi can anybody help me in understanding what this afl is doing in simple language. i mean what this afl is using to that i can get coverted in to trade script language which can be used in zerodha EA advisor

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prev=AMA2(C,1,0);
d=IIf(C>Ref(Max(Max(H,Ref(H,-20)),Max(Ref(H,-10),Ref(H,-15))),-1),Min(Min(L,Ref(L,-20)),Min(Ref(L,-10),Ref(L,-15))),
IIf(C<Ref(Min(Min(L,Ref(L,-20)),Min(Ref(L,-10),Ref(L,-15))),-1),Max(Max(H,Ref(H,-20)),Max(Ref(H,-10),Ref(H,-15))),PREV));
a=Cross(Close,d);
b=Cross(d,Close);
state=IIf(BarsSince(a)<BarsSince(b),1,0);
s=state>Ref(state,-1);
ss=state<Ref(state,-1);
sss=state==Ref(state,-1);
col=IIf(state == 1 ,51,IIf(state ==0,4,1));
Plot(C,"",Col,64);
PlotShapes( shapeUpArrow * s ,6,0,L);
PlotShapes( shapeDownArrow *ss ,4,0,H);

Filter = s OR sss OR sss ;
AddColumn(C,"close",1.2);
AddColumn( IIf( s, 66,1 ), "buy", formatChar, 1, bkcolor =IIf
(s,colorYellow, colorPink ));
AddColumn( IIf( Ss, 83,1 ), "sell", formatChar, 1, bkcolor =IIf
(Ss,colorPink, colorYellow ));
AddColumn( IIf( sss, 87,1 ), "wait", formatChar, 1, bkcolor =IIf
(sss,colorYellow, colorRed ));

_SECTION_BEGIN("");
_N(Title = "{{NAME}} - {{INTERVAL}} {{DATE}}: "+_DEFAULT_NAME()+" :
{{OHLCX}} {{VALUES}}"
+"\n"+EncodeColor(colorYellow)+
WriteIf(s,"EXIT all Short positions\nif trading long positions, enter long
Now-\nOR at the market price on tomorrow's Open with
stop="+EncodeColor(4)+WriteVal(L+.75*ATR(5),1.4)+" ,","")+
WriteIf(ss,"exit all long positions today with a Market On Close (MOC)
order\nOR at the market price on tomorrow's Open with
stop="+EncodeColor(4)+WriteVal(Ref(H+.75*ATR(5), -1),1.4)+",","")+
WriteIf( sss ,"No trading signals today.","") );



_SECTION_BEGIN("swing1");
no=20;
res=HHV(H,no);
sup=LLV(L,no);
avd=IIf(C>Ref(res,-2),1,IIf(C<Ref(sup,-2),-2,0));
avn=ValueWhen(avd!=0,avd,1);
supres=IIf(avn==1,sup,res);

a=Cross(C,supres);
b=Cross(supres,C);

style = a * styleStaircase + b * styleStaircase;

PlotShapes(a,style, IIf(a,colorGreen,colorRed), 0, IIf(a,Low,High));

_SECTION_END();



_SECTION_BEGIN("trend");
uptrend=PDI(20)>MDI(10)AND Signal(29)<MACD(13);
downtrend=MDI(10)>PDI(20)AND Signal(29)>MACD(13);


Plot( 2, /* defines the height of the ribbon in percent of pane width
*/"ribbon",
IIf( uptrend, colorGreen, IIf( downtrend, colorRed, 0 )), /* choose color */
styleOwnScale|styleArea|styleNoLabel, -0.5, 100 );

_SECTION_END();

//d = Close > Ref( ChandelierHL(ATR(3),20), -1);
//e =Close < Ref( ChandelierHL(ATR(3),20), -1);
//f = Close < Ref( ChandelierHL(ATR(3),20), -1);
//g = Close > Ref( ChandelierHL(ATR(3),20), -1);

Buy = s AND a AND uptrend ;
Short = ss AND b AND downtrend ;
Sell = ss AND b AND downtrend ;
Cover = s AND a AND uptrend ;

Buy=ExRem(Buy,Sell);
Sell=ExRem(Sell,Buy);
Cover=ExRem(Cover,Short);
Short=ExRem(Short,Cover);

Filter=Buy OR Sell;
Filter= Cover OR Short;

AddColumn( Buy, "Buy", 1);
AddColumn(Sell, "Sell", 1);
AddColumn(Close,"Close",1.2);
AddColumn(Volume,"Volume",1.0);

_SECTION_BEGIN("Volume");
Plot( Volume, _DEFAULT_NAME(), ParamColor("Color", colorLavender ),
styleNoTitle | ParamStyle( "Style", styleHistogram | styleOwnScale |
styleThick | styleNoLabel, maskHistogram ), 2 );
_SECTION_END();
// Plot the Buy and Sell arrows.
shape = Buy * shapeUpArrow + Sell * shapeDownArrow;
PlotShapes(shape, IIf(Buy,colorGreen,colorRed), 0, IIf(Buy,Low,High));

Plot(supres,"Swing",colorblue,styleStaircase);

SetChartBkGradientFill( ParamColor("BgTop", ColorRGB( 172,172,172 )),

ParamColor("BgBottom", ColorRGB( 172,172,172
)),ParamColor("titleblock",ColorRGB( 172,172,172 )));