Net tick volume indicator

[Rod Shaft]

I'm trying to create an indicator that tracks the cumulative tick volume on the ask minus the cumulative tick volume on the bid (ie. a 100 share print on the ask or higher increases the indicator value by 100, a 100 share print on the bid or lower decreases the indicator value by 100). For some reason the following formula returns nothing. Could someone please help?

Thanks,
Rod


var bid = 0;
var ask = 0;
var tradeSize = 0;
var tradePrice = 0;
var upVol = 0;
var dnVol = 0;
var netVol = 0;

function preMain() {
setStudyTitle("Net Tick Volume");
setCursorLabelName("Net Tick Volume");
setDefaultBarFgColor(Color.blue, 0);
setShowCursorLabel(true);
setDefaultBarThickness( 2, 0 );
addBand( 0, PS_DOT, 3, Color.white);
}

function main() {

bid = getMostRecentBid();
ask = getMostRecentAsk();
tradePrice = getMostRecentTrade();
tradeSize = getMostRecentTradeSize();

time60 = getHour(0) * 60;
time60 += getMinute(0);

if((isTick() || isRawTick()) && time60>=570){

if(tradePrice<=bid)
dnVol += tradeSize;
else if(tradePrice>=ask)
upVol += tradeSize;

netVol = upVol - dnVol;

return netVol;
}
else return;
}

[eSignal_JasonK]

Hello Rod,

There is currently a formula in our EFS Library that does what you are trying to do. See BidAskRatio.efs. You will need to change the Study Output parameter to Ask-Bid through Edit Studies. You could use this formula or compare your code to this formula to see a working example of how to accomplish this task.