trgigering trades on multiple timeframe

I'm confused on how to set up a trigger that does the following:

1) take trades on 30 minute bar chart only if criteria is met on the second data stream.
example: condition1= c[1] of data2 > average(c,19)[1] of data2 { where data2 is the same underlying stock but using daily bars instead of 30 minute bars.}
if condition1=true then .......

I'm confused on how to set up a trigger that does the following:

1) take trades on 30 minute bar chart only if criteria is met on the second data stream.
example: condition1= c[1] of data2 > average(c,19)[1] of data2 { where data2 is the same underlying stock but using daily bars instead of 30 minute bars.}
if condition1=true then .......

see 4th post:
EasyLanguage FAQ
http://forum.tssupport.com/viewtopic.php?t=6929