Summation

[frankduc]

Hello,

If i do a summation summation = SUM(Volume,1235)[0]; it will return the sum of all the volume between 1235 and 0 barsAgo.

Is it possible to use summation to Sum volume from 1235 to 0 barIndex or from 0 barsAgo to 0 barIndex?

Ty

[NinjaTrader_Kate]

Hello frankduc,

Thank you for your post.

1235 is the number of bars to look back from whatever bar you're referencing, it's not like between specific bars. We'd advise you to use GetValueAt and then create your own method to calculate the sum in this case by looping through the bars you'd want to sum up.

https://ninjatrader.com/support/helpGuides/nt8/?getvalueat.htm

However, if you wanted the sum of all the bars to the current one, that'd be doable with SUM:

SUM(Volume, CurrentBar)[0];

Please let us know if we may be of further assistance to you.

[frankduc]

Kate,

Than why if i do summation = SUM(Volume, CurrentBar)[0]; the Print(summation); reply Value of property Period of Ninjascript SUM is 0 and not in valid range between 1 and 2147483647?

This is in OBU.

thanks

[NinjaTrader_Kate]

Hello frankduc,

Thank you for your reply.

The SUM() function needs at least 2 bars to sum up. Try putting a CurrentBar check before it:

if(CurrentBar < 1) return;

Please let us know if we may be of further assistance to you.

[frankduc]

Kate,

Is it possible to replace CurrentBar by my variable foundIndex? Cause if i do i still get the message.

For if(CurrentBar < 1) return; works fine i can get the total number of contracts in the chart.

Frank

[NinjaTrader_Kate]

Hello frankduc,

Thank you for your reply.

You could certainly replace CurrentBar with another variable, however, given that I don't know what the variable you asked about holds as far as values, I wouldn't be able to say for sure if the contents of said variable would be a viable replacement.

Please let us know if we may be of further assistance to you.