Trading Indicator: True between the first and last signal

This custom trading indicator gets a time-series or condition and starts returning "1" on the first occurrence of "true" signal. It keeps returning "1" until there are no longer "true" signals in the future (in the provided time-series or condition). In other words, it returns "true" or "1" between the first and last signal.

Example:

01/01/2011 - 0
01/02/2011 - 1
01/03/2011 - 0
01/04/2011 - 0
01/05/2011 - 1
01/07/2011 - 0
01/08/2011 - 1
01/09/2011 - 0
01/10/2011 - 0

The variable returned by this function looks like:

01/01/2011 - 0
01/02/2011 - 1
01/03/2011 - 1
01/04/2011 - 1
01/05/2011 - 1
01/07/2011 - 1
01/08/2011 - 1
01/09/2011 - 0
01/10/2011 - 0

Example of usage:

If you are working with a history of dividend payments database, you can use this function to return "true" on bars that are between the first and last dividend payments.
How to download the history of dividend payments for stocks in the US market

The function name is "BetweenFirstLast" and here is how it can be applied to the dividend database presented in the above link:

a = GetData("dividend","dividend",Zero);
b = BetweenFirstLast(a);



The black signals are the dividend payments.
The red line is the time-series returned by the "BetweenFirstLast" function.

Please note that this indicator references future bars.

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