Multiple data series

[Frank990@xxxxxxx]

I am trying  to write a indicator which will substract todays (15 min data
close ) from yesterdays EOD (End of Day)close.

This will be on two data series;  
The syntax for data1 is correct.

How do I reference Data2
Can anyone help me with the syntax for value2 


Thanks



Input:
Price1(Close of data1),
Price2(Close of data2);



Value1 = IFF( CloseD(1) > 0, Close - CloseD(1), 0 );         { if  C is > C of
Yesterday  for Data1}
 
Value2 = IFF( Price2(1)  > 0,  Price2 - Price2(1), 0);          {  if C  is >
C of Yesterday  for Data2}

Value3 = Value1 + Value2;

Plot( Value3, "Average");