osDollarATR: osDollarATR
In pdrano/IKTrading: Custom indicators, signals, and rules

computes an order size by way of ATR quantities, as a proportion of tradeSize

  osDollarATR(orderside, tradeSize, pctATR,
    maxPctATR = pctATR, data, timestamp, symbol,
    prefer = "Open", portfolio, integerQty = TRUE,
    atrMod = "", rebal = FALSE, ...)

`orderside`	long or short
`tradeSize`	a notional dollar amount for the trade
`pctATR`	a percentage of the tradeSize to order in units of ATR. That is, if tradeSize is 10000 and pctATR is .02, then the amount ordered will be 200 ATRs of the security. If the last observed ATR is 2, then 100 units of the security will be ordered.
`maxPctATR`	an upper limit to how many ATRs can be held in a position; a risk limit
`integerQty`	an integer quantity of shares
`atrMod`	a string modifier in case of multiples of this indicator being used. Will append to the term 'atr', that is, atrMod of "X" will search for a term called 'atrX' in the column names of the mktdata xts object.
`rebal`	if TRUE, and current position exceeds ATR boundaries, will automatically sell