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Asked: 2026-05-24T09:39:40+00:00

I am trying to run this code OBVMA <- function(price,volume,n) { price <- try.xts(price,

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I am trying to run this code

OBVMA <- function(price,volume,n) {
price <- try.xts(price, error = as.matrix)
volume <- try.xts(volume, error = as.matrix)
if (!(is.xts(price) && is.xts(volume))) {
price <- as.vector(price)
volume <- as.vector(volume)
}
obvma <- c(volume[1], ifelse(ROC(price) > 0, volume, -volume)[-1])
obvma <- cumsum(obvma)
obvma <- runMean(obvma, n)
if (is.xts(obvma)) {
obvma <- xts(obvma, index(price))
colnames(obvma) <- "obvma"
}
reclass(obvma, price)
}

require(quantstrat)
suppressWarnings(rm("order_book.obvcross",pos=.strategy))
suppressWarnings(rm("account.obvcross","portfolio.obvcross",pos=.blotter))
suppressWarnings(rm("account.st","portfolio.st","stock.str","stratOBVCROSS","initDate","initEq",'start_t','end_t'))
stock.str='ALPHA.AT' 
currency('EUR')
stock(stock.str,currency='EUR',multiplier=1)
initDate='2001-12-31'
initEq=1000000
portfolio.st='obvcross'
account.st='obvcross'
initPortf(portfolio.st,symbols=stock.str, initDate=initDate)
initAcct(account.st,portfolios=portfolio.st, initDate=initDate)
initOrders(portfolio=portfolio.st,initDate=initDate)

stratOBVCROSS<- strategy(portfolio.st)

stratOBVCROSS <- add.indicator(strategy = stratOBVCROSS, name = "OBV", arguments = list(price = quote(Cl(mktdata)),volume = quote(Vo(mktdata))),label= "obv")
stratOBVCROSS <- add.indicator(strategy = stratOBVCROSS, name = "OBVMA", arguments = list(price = quote(Cl(mktdata)),volume = quote(Vo(mktdata)), n=20),label="obvma20")

stratOBVCROSS <- add.signal(strategy = stratOBVCROSS,name="sigCrossover",arguments = list(column=c("obv","obvma20"),relationship="gte"),label="obv.gte.obvma20")
stratOBVCROSS <- add.signal(strategy = stratOBVCROSS,name="sigCrossover",arguments = list(column=c("obv","obvma20"),relationship="lt"),label="obv.lt.obvma20")

stratOBVCROSS <- add.rule(strategy = stratOBVCROSS,name='ruleSignal', arguments = list(sigcol="obv.gte.obvma20",sigval=TRUE, orderqty=100, ordertype='market', orderside='long'),type='enter')
stratOBVCROSS <- add.rule(strategy = stratOBVCROSS,name='ruleSignal', arguments = list(sigcol="obv.lt.obvma20",sigval=TRUE, orderqty=-100, ordertype='market', orderside='long'),type='exit')

stratOBVCROSS <- add.rule(strategy = stratOBVCROSS,name='ruleSignal', arguments = list(sigcol="obv.lt.obvma20",sigval=TRUE, orderqty=-100, ordertype='market', orderside='short'),type='enter')
stratOBVCROSS <- add.rule(strategy = stratOBVCROSS,name='ruleSignal', arguments = list(sigcol="obv.gte.obvma20",sigval=TRUE, orderqty=100, ordertype='market', orderside='short'),type='exit')

getSymbols(stock.str,from=initDate)
for(i in stock.str)
  assign(i, adjustOHLC(get(i),use.Adjusted=TRUE))

start_t<-Sys.time()
out<-try(applyStrategy(strategy=stratOBVCROSS,portfolios=portfolio.st))

But when i apply the last line of the code i am receiving this error message

Error in if (length(j) == 0 || (length(j) == 1 && j == 0)) { : 
  missing value where TRUE/FALSE needed

Could someone assist me to find a solution to this error message

Thanks in advance

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1 Answer

  1. Editorial Team

    Your issue is that you’re looking for a column ‘obvma20’, but your function creates a column named ‘obvma’.

    The simple answer is to change your add.signal definitions to use ‘obvma’.

    quantstrat won’t overwrite column names where they exist, assuming that the function author (you) wanted the column label to be a certain way. We may change that in the future to look for duplicated column names and apply the label in that case, but in this case you would still be looking for the wrong column name.

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