closeAllOrders: Close all open orders
In DunderChief/roanda: What the package does (short line)

Description Usage Arguments Examples

Closes all orders for a given Oanda account.

1	closeAllOrders(instrument, acct, auth_id, acct_type = "fxpractice")

`instrument`	A single character string representing the currency to perform function on e.g. "EUR_USD"
`acct`	The Oanda account number
`auth_id`	Oanda requires a unique authorization ID for every account
`acct_type`	Account type e.g. fxpractice, fxtrade, or sandbox)

##---- Should be DIRECTLY executable !! ----
##-- ==>  Define data, use random,
##--	or do  help(data=index)  for the standard data sets.

## The function is currently defined as
function (instrument, acct, auth_id, acct_type = "fxpractice") 
{
    auth <- c(Authorization = paste("Bearer", auth_id))
    url <- paste0("https://api-", acct_type, ".oanda.com/v1/accounts/", 
        acct, "/positions/", instrument)
    closed <- fromJSON(getURL(url, httpheader = auth, customrequest = "DELETE"))
    return(closed)
  }