MAX problem

[nordseven]

Hello i'm check my indicator on HISTORY and i got the problem with MAX().

int daysBackStart = 7;
int daysBackFinish = 3;

DateTime today = DateTime.Now;
DateTime beginDay = today.AddDays(-1*daysBackStart);
DateTime endDay = today.AddDays(-1*daysBackFinish);


// OnBarUpdate

int startBar = CurrentBar - Bars.GetBar(beginDay);
int endBar = CurrentBar - Bars.GetBar(endDay);

int fromBar = startBar+10;
double myMax = MAX(High,10)[fromBar]; // if fromBar < 0 i have exception "needed to be between 0 and 34100 but was -47 error."

In NT7 all works fine. Why in NT8 i can't count MAX with "fromBar < 0"?

[NinjaTrader_AlanP]

Hello Nordseven,

Thank you for your note.

Passing a negative index in NT7 worked but was not supported. In NT8 it neither works nor is supported. A negative index value only works historically and never in live data.

Please let us know if you need further assistance.

[nordseven]

Of course i need assistance.
How i can count MAX on history bars?
And where is the line between history bars and real time?

[NinjaTrader_AlanP]

Hello Nordseven,

Passing a negative value as a bar index in NT8 is not supported.

I would suggest checking to make sure the bar index value is not negative.

So prior to,

double myMax = MAX(High,10)[fromBar];

You could add,

if(fromBar<0) return;

Please let us know if you need further assistance.