Once (Reserved Word)

Disclaimer

Reserved word used to specify that the EL statement or begin-end block that follows will only be executed once.  

Syntax

Once ([optional boolean expression]) {follow by single statement or statement block}

[begin]

   Statement(s)

[end]

Example

Once Value1 = GetAppInfo( aiApplicationType );

Performs the assignment of Value1 a single time. This improves performance instead of using a separate conditional expression (which must be tested on each bar) such as:

if CurrentBar = 1 then Value1 = GetAppInfo( aiApplicationType );

Additional Examples

Once (MarketPosition=1)
Begin
 ClearPrintLog;
  Print("Log Header");
End;

Clears the print log and prints a header the first time the market position equals once.