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Post From: NumPriceLevels Showing Zero in ACSIL Study

[2026-05-07 03:04:12]
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TraderBiku - Posts: 41
Hello,

I'm trying to write a simple study to access VAP information, but getting stuck at the very start because I'm not able to get the NumPriceLevels function to show anything other than 0. I am on a 5min ES chart with number bars up, so I can visually see the ticks/levels, but the study is not able to access that information programatically. Any help would be much appreciated:

#include "sierrachart.h"

SCDLLName("LVNFinder")

SCSFExport scsf_LVNFinder(SCStudyInterfaceRef sc)
{
// logging object
SCString msg;

// Set configuration variables
if (sc.SetDefaults)
{
sc.GraphName = "LVNFinder";
sc.GraphRegion = 0;
sc.MaintainVolumeAtPriceData = 1;
sc.UpdateAlways = 1;
return;
}

// declare a vap container
const s_VolumeAtPriceV2* p_VAP = NULL;

// get number of price levels in most recent visible bar
int NumPriceLevels = sc.VolumeAtPriceForBars->GetSizeAtBarIndex(sc.IndexOfLastVisibleBar);

msg.Format(
"MaintainVAP=%d LastVisible=%d NumPriceLevels=%d",
sc.MaintainVolumeAtPriceData,
sc.IndexOfLastVisibleBar,
NumPriceLevels
);
sc.AddMessageToLog(msg, 0);
}