Volume across languages

The built-in indicators computed from volume. Each row maps one concept from Lipi to the other languages; the word in a cell is the relation, explained in the language map overview.

Concept	Lipi	MQL4	MQL5	NinjaScript	Pine Script	thinkScript
Cumulative sum	`ta.cum`	Absent	Caveat	Absent	Exact	Exact
Negative volume index	`ta.nvi`	Absent	Absent	Absent	Caveat	Caveat
On-balance volume	`ta.obv`	Caveat	Caveat	Exact	Caveat	Exact
Positive volume index	`ta.pvi`	Absent	Absent	Absent	Caveat	Caveat
Price-volume trend	`ta.pvt`	Absent	Absent	Absent	Caveat	Caveat
Volume-weighted average price	`ta.vwap`	Absent	Absent	Caveat	Caveat	Caveat
Williams variable accumulation/distribution	`ta.wvad`	Absent	Absent	Absent	Caveat	Absent

Each section below gives the Lipi construct first, then the construct in each language, with a note wherever behaviour differs. The language name links to the documentation the row was checked against.

Cumulative sum

Accumulates source as the script advances through the chart. In Lipi: ta.cum.

Language	Construct	Relation	Note
MQL4		Not in MQL4	No running-total function; keep a variable or array updated per bar.
MQL5	`vector::CumSum`	Equivalent, with a caveat	Cumulative sum over a whole vector at once, not a running total carried from bar to bar. State and side effects: No state kept between calls; an incremental total needs a variable you maintain.
NinjaScript		Not in NinjaScript	No running-total indicator (SUM is a rolling window); keep a Series<double> or field and add each bar.
Pine Script	`ta.cum`	Exact
thinkScript	`TotalSum`	Exact

Negative volume index

Negative volume index for the chart’s bars. In Lipi: ta.nvi.

Language	Construct	Relation	Note
MQL4		Not in MQL4	No negative volume index among the indicator functions.
MQL5		Not in MQL5	No negative volume index among the built-in indicators.
NinjaScript		Not in NinjaScript	No negative volume index in the system list; code it by hand.
Pine Script	`ta.nvi`	Equivalent, with a caveat	In Pine ta.nvi is a variable written without parentheses; Lipi exposes it as the function ta.nvi().
thinkScript	`NegativeVolumeIndex`	Equivalent, with a caveat	thinkScript starts the index at 100; Lipi’s ta.nvi starts at 1.0, so the levels differ.

On-balance volume

On-balance volume for the chart’s bars. In Lipi: ta.obv.

Language	Construct	Relation	Note
MQL4	`iOBV`	Equivalent, with a caveat	Takes an applied-price constant that Lipi’s argument-free obv lacks. History indexing: shift counts bars back from the current bar; shift 0 is the still-forming bar, and any shift can be read in one call. Other timeframes: symbol and timeframe arguments read another symbol or period directly; Lipi ta calls use the chart’s own bars.
MQL5	`iOBV`	Equivalent, with a caveat	Takes an applied_volume argument to choose the volume type; Lipi’s call has no arguments. One buffer. State and side effects: Returns a handle; values are read later with CopyBuffer and are not ready right after creation. History indexing: CopyBuffer start_pos 0 is the current bar and counts toward the past; copied data lands oldest-first. Other timeframes: Symbol and timeframe are explicit arguments, so another symbol or timeframe is requested directly.
NinjaScript	`OBV`	Exact
Pine Script	`ta.obv`	Equivalent, with a caveat	In Pine ta.obv is a variable written without parentheses; Lipi exposes it as the function ta.obv().
thinkScript	`OnBalanceVolume`	Exact

Positive volume index

Positive volume index for the chart’s bars, the counterpart of talib.nvi. In Lipi: ta.pvi.

Language	Construct	Relation	Note
MQL4		Not in MQL4	No positive volume index among the indicator functions.
MQL5		Not in MQL5	No positive volume index among the built-in indicators.
NinjaScript		Not in NinjaScript	No positive volume index in the system list; code it by hand.
Pine Script	`ta.pvi`	Equivalent, with a caveat	In Pine ta.pvi is a variable written without parentheses; Lipi exposes it as the function ta.pvi().
thinkScript	`PositiveVolumeIndex`	Equivalent, with a caveat	thinkScript starts the index at 100; Lipi’s ta.pvi starts at 1.0, so the levels differ.

Price-volume trend

Price-volume trend for the chart’s bars. In Lipi: ta.pvt.

Language	Construct	Relation	Note
MQL4		Not in MQL4	No price-volume trend among the indicator functions.
MQL5		Not in MQL5	No price-volume trend among the built-in indicators.
NinjaScript		Not in NinjaScript	No price-volume trend in the system list; code it by hand.
Pine Script	`ta.pvt`	Equivalent, with a caveat	In Pine ta.pvt is a variable written without parentheses; Lipi exposes it as the function ta.pvt().
thinkScript	`PriceAndVolumeTrend`	Equivalent, with a caveat	thinkScript multiplies volume by the percent change of close; Lipi’s ta.pvt uses the fractional change, so its values are 100 times smaller.

Volume-weighted average price

Volume-weighted average price built on source. In Lipi: ta.vwap.

Language	Construct	Relation	Note
MQL4		Not in MQL4	No volume-weighted average price among the indicator functions.
MQL5		Not in MQL5	No VWAP among the built-in indicators.
NinjaScript	`OrderFlowVWAP`	Equivalent, with a caveat	Needs a resolution, a trading-hours template that sets the reset point, and deviation settings; deviation bands are separate series.
Pine Script	`ta.vwap`	Equivalent, with a caveat	Pine resets on an anchor condition (default daily) and has a bare hlc3 variable and band overload; Lipi’s takes only source with no anchor argument. State and side effects: Pine’s accumulation restarts on the anchor; Lipi offers no anchor control and its reset rule is undocumented.
thinkScript	`vwap`	Equivalent, with a caveat	Takes an aggregation period (day, week, month) that sets the reset window, plus symbol and price type; Lipi ta.vwap has only a source. Other timeframes: The period argument can read another aggregation or symbol; Lipi cannot.

Williams variable accumulation/distribution

Williams variable accumulation/distribution, calculated on the chart’s own bars. In Lipi: ta.wvad.

Language	Construct	Relation	Note
MQL4		Not in MQL4	No Williams variable accumulation/distribution among the indicator functions.
MQL5		Not in MQL5	No Williams variable accumulation/distribution among the built-in indicators (iAD and iBWMFI are different indicators).
NinjaScript		Not in NinjaScript	No Williams variable accumulation/distribution in the system list; code it by hand.
Pine Script	`ta.wvad`	Equivalent, with a caveat	Pine ta.wvad is a variable with no arguments; Lipi calls ta.wvad(length) and ignores length. Both give the per-bar (close-open)/(high-low)*volume.
thinkScript		Not in thinkScript	No Williams variable accumulation/distribution; WilliamsAD is the different Williams Accumulation/Distribution study.

Manual

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Reference

Volume across languages

Cumulative sum

Negative volume index

On-balance volume

Positive volume index

Price-volume trend

Volume-weighted average price

Williams variable accumulation/distribution

​Cumulative sum

​Negative volume index

​On-balance volume

​Positive volume index

​Price-volume trend

​Volume-weighted average price

​Williams variable accumulation/distribution

Cumulative sum

Negative volume index

On-balance volume

Positive volume index

Price-volume trend

Volume-weighted average price

Williams variable accumulation/distribution