market delta

Hallo everybody

Could somebody translate multichart formula for market delta.

Thanks in advance

inputs:
Threshold1( 150 ),
Threshold2( 300 ),
Threshold3( 600 ),
DisplayDelta( false ),
Type( 1 ), // 1 = Use Upticks/Downticks, 2 = Use Bid/Ask
BidAskArraySz( 1000 );

variables:
TickSize( MinMove / PriceScale ),
PriceAtIndex( Open ),
BaseIndex( BidAskArraySz/2 ),
Red1(RGB(255,185,185)),
Red2(RGB(255,128,128)),
Red3(RGB(255,0,0)),
Red4(RGB(128,0,0)),
Green1(RGB(210,255,210)),
Green2(RGB(125,255,125)),
Green3(RGB(0,255,0)),
Green4(RGB(0,128,0)),
iz( 0 );

variables:
intrabarpersist Price( 0 ),
intrabarpersist MyVol( 0 ),
intrabarpersist VolTmp( 0 ),
intrabarpersist LastTick( 0 ),
intrabarpersist MyCurrentBar( 0 ),
intrabarpersist Index( 0 ),
intrabarpersist BidAskDelta( 0 ),
intrabarpersist xDelta( 0 ),
intrabarpersist TextString(""),
intrabarpersist MyUpTicks( 0 ),
intrabarpersist MyDownTicks( 0 );

Arrays:
intrabarpersist Bid[](0),
intrabarpersist Ask[](0);

Array_SetMaxIndex( Bid, BidAskArraySz );
Array_SetMaxIndex( Ask, BidAskArraySz );

if (Type = 1 or Type = 2) and LastBarOnChart and BarType < 2 then
begin
MyVol = Ticks;
PriceAtIndex = Open;

if CurrentBar > MyCurrentBar then
begin
VolTmp = 0;
MyCurrentBar = CurrentBar;
MyUpTicks = 0;
MyDownTicks = 0;

for iz = 0 to BidAskArraySz - 1
begin
Bid[iz] = 0;
Ask[iz] = 0;
end;
end;

Index = BaseIndex + (Close - PriceAtIndex) / TickSize;

if InsideBid < InsideAsk then
begin
if Type = 1 then
begin
// Use Upticks/Downticks
if DownTicks <> MyDownTicks then
Bid[Index] = Bid[Index] + MyVol - VolTmp
else if UpTicks <> MyUpTicks then
Ask[Index] = Ask[Index] + MyVol - VolTmp
else
begin
if Close <= LastTick then
Bid[Index] = Bid[Index] + MyVol - VolTmp
else
Ask[Index] = Ask[Index] + MyVol - VolTmp;
end;
end
else
begin
// Use Bid/Ask
// Warning: TradeStation provides snapshot of bid/ask
if Close <= InsideBid then
Bid[Index] = Bid[Index] + MyVol - VolTmp
else if Close >= InsideAsk then
Ask[Index] = Ask[Index] + MyVol - VolTmp
else
begin
// Last tick was between bid/ask
if Close <= LastTick then
Bid[Index] = Bid[Index] + MyVol - VolTmp
else
Ask[Index] = Ask[Index] + MyVol - VolTmp;
end;
end;
end;

MyUpTicks = UpTicks;
MyDownTicks = DownTicks;
VolTmp = MyVol;
LastTick = Close;

xDelta = 0;
Price = Low;

while Price <= High
begin
Index = BaseIndex + (Price - PriceAtIndex) / TickSize;
TextString = NumToStr(Bid[Index],0) + " x " + NumToStr(Ask[Index],0);
Value99 = Text_New(Date, Time, 0, " ");
Text_SetString(Value99, TextString);
Text_SetLocation(Value99, Date, Time, Price);
Text_SetStyle(Value99, 1, 1);

BidAskDelta = Ask[Index] - Bid[Index];
if BidAskDelta > Threshold3 then
Text_SetColor(Value99, Green4)
else if BidAskDelta > Threshold2 then
Text_SetColor(Value99, Green3)
else if BidAskDelta > Threshold1 then
Text_SetColor(Value99, Green2)
else if BidAskDelta >= 0 then
Text_SetColor(Value99, Green1)
else if BidAskDelta < -Threshold3 then
Text_SetColor(Value99, Red4)
else if BidAskDelta < -Threshold2 then
Text_SetColor(Value99, Red3)
else if BidAskDelta < -Threshold1 then
Text_SetColor(Value99, Red2)
else
Text_SetColor(Value99, Red1);

xDelta = xDelta + BidAskDelta;

Price = Price + TickSize;
end;

if DisplayDelta = true then
begin
Value99 = Text_New(Date, Time, 0, " ");
Text_SetString(Value99, NumToStr(xDelta, 0 ));
Text_SetLocation(Value99, Date, Time, Low - TickSize);
Text_SetStyle(Value99, 1, 1);

if xDelta >= 0 then
Text_SetColor(Value99, Green)
else
Text_SetColor(Value99, Red);
end;
end;