need afl conv "Moving beyond the closing price" by Thomas Stridsman-tradestation code

#1
hi friends

can somebody convert this trade station code into afl please

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HTML:
//TradeStation (EasyLanguage) code for "Moving beyond the closing price" by Thomas Stridsman, starting on p. 60
//http://www.activetradermag.com/index.php/c/Strategy_code
Inputs: LookBack(20);

Variable: PercChange(0),
NewLevel(0),
AvgPercChange(0);

PercChange = (Close -Close[1])/Close[1];

AvgPercChange =Average(PercChange,20);

NewLevel = Close *(1 + AvgPercChange);
Plot1[1](NewLevel,);

**

Inputs: StDevs(1);

Variable:StdDevChange(0),
UpLevel(0), DownLevel(0);

StdDevChange =StdDev(PercChange, 20);

UpLevel = Close *(1 + AvgPercChange +StDevs * StdDevChange);

DownLevel = Close *(1 + AvgPercChange -StDevs * StdDevChange);
Plot2[-1](UpLevel,);
Plot3[-1](DownLevel,);

**

HighPercChange = (High - Close[1])/Close[1];

**

Input: VSStd(1);

Vars: SumVS(0), AvgVS(0), DiffVS(0), StdVS(0), SetArr(0),SumArr(0), DiffArr(0), VSLow(0), VSMid(0), VSHigh(0);

{First we define the array}

Array: VS[20](0);

{Then we‰re using a loop function to fill it with the different price changes}

for SetArr = 0 To 4 Begin

VS[SetArr * 4 + 0] = (O[SetArr] - C[SetArr + 1]) / C[SetArr + 1];

VS[SetArr * 4 + 1] = (H[SetArr] - C[SetArr + 1]) / C[SetArr + 1];

VS[SetArr * 4 + 2] = (L[SetArr] - C[SetArr + 1]) / C[SetArr + 1];

VS[SetArr * 4 + 3] = (C[SetArr] - C[SetArr + 1]) / C[SetArr + 1];

End;

for SumArr = 0 To 19 Begin

if SumArr = 0 Then

SumVS = 0;

SumVS = SumVS + VS[SumArr];

if SumArr = 19 Then

{Here we calculate the average price change over the period}

AvgVS = SumVS / 20;

for DiffArr = 0 To 19 Begin

if DiffArr = 0 Then

DiffVS = 0;

{Then we calculate the standard deviation}

DiffVS = DiffVS + Square(VS[DiffArr] - AvgVS);

if DiffArr = 19 Then

StdVS = SquareRoot(DiffVS / 20);

End;

End;

{Finally, we add the moving average (AND the standard deviations) to the latest Close 
for an indication of tomorrow‰s trading range}

VSLow = C * (1 + (AvgVS - StdVS * VSStd));

VSMid = C * (1 + AvgVS);

VSHigh = C * (1 + (AvgVS + StdVS * VSStd));

Plot1[-1](VSLow, ‹VS Low);

Plot2[-1](VSMid, ‹VS Mid);

Plot3[-1](VSHigh, ‹VS High);
 
Last edited:

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