[amibroker] Code needed to always include a certain ticker in Explore ???

[gmorlosky]

I would like to have a certain ticker (S&P500) always included as one of the 
tickers in the Explore. For example, I choose my watchlist that has ETFs only, 
BUT I want the explore to also have the S&P500 ticker info, for relevance.
I want to have the reference in the code, not include the S&P500 ticker in the 
watchlist.
Thanks.