Try the code sent and you will see that it is not the same.

Time-Segmented-Volume-TSV.jpg

Apparently, according to the attached data, there is an error in the indicator code.
Attached .itf file with the modified data. The appearance seems much more consistent with price tracking.

TSV-Time-Segmented-Volume-2.itf TSV-Imagen.jpg TSV-Cod.-Tradinview.jpg

The last code is from the Tradingview platform (not mine).
In all the websites that comment on this indicator it is indicated that the oscillator crosses the 0 line both up and down. In this case it is fulfilled (in the edited Prorealcode not).

Actually ALL websites (Worden’s too) talk about ZERO crossing.

I think the formula I used (TSV=(Sum( IIf( C > Ref(C,-1), V * ( C-Ref(C,-1) ), IIf( C < Ref(C,-1),–V * ( C-Ref(C,-1) ), 0 ) ) ,18));) has an unneeded “-” sign in front of the second reference of V (volume). Since it negates an already negative value, thus making it positive and affecting the subsequent sum.

Simply removing that minus sign appears to be the solution.

I actually found ONCE the correct formula (without the  MINUS sign), but ALL other sites had that sign, so I used the most used, which, instead is the incorrect one. I think that is due to a wrong Copy & Paste by those websites.

Anyway, thanks to @Barrabas15 for spotting an issue that helped me work it out.

The correct code of TSV is:

// TSV Time Segmented Volume indicator
//
// 13 = number of daily HALF HOURS
//  7 = ????
//
//      Example Settings:
// Short Term Trading       :  TSV period between  9 and 12
// Intermediate Term Trading:  TSV period between 18 and 25
// Long Term Trading        :  TSV period between 35 and 45
//
// --------------------------------------------------------------------------------------
// apparently wrong   formula:
//
// TSV=(Sum( IIf( C > Ref(C,-1), V * ( C-Ref(C,-1) ), IIf( C < Ref(C,-1),-V * ( C-Ref(C,-1) ), 0 ) ) ,18));
//                                                                       ↑
// --------------------------------------------------------------------------------------
// apparently CORRECT formula:
//
// TSV=(Sum( IIf( C > Ref(C,-1), V * ( C-Ref(C,-1) ), IIf( C < Ref(C,-1), V * ( C-Ref(C,-1) ), 0 ) ) ,18));
//
// (the difference is not using the "-" sign if front of the second reference to V, since it negates
// a negative value, thus making it positive, thus invalidating the following summation)
// --------------------------------------------------------------------------------------
//ONCE p1    = 13
//ONCE p2    = 7
//ONCE Mtype = 0
p1           = max(1,min(999,p1))
p2           = max(1,min(999,p2))
Mtype        = max(0,min(6,Mtype))
MyVol = 0
IF close <> close[1] THEN
//IF close > close[1] THEN
   MyVol = volume * (close - close[1])   //It's automatically negative when current CLOSE is lower than the previous candles's
//ELSIF close < close[1] THEN
   //MyVol = volume * (close - close[1])
ENDIF
TSV    = summation[p1](MyVol)
Signal = average[p2,Mtype](TSV)
RETURN TSV AS "Tsv",Signal AS "Signal",0 AS "0"

x-4.jpg TSV-Time-Segmented-Volmodif..itf

It is available for all the instruments for which the broker makes it available.

It is available for most of them, even for currency pairs since a few months ago.