关于日线图最佳指标的想法 (ideas on best indicator for daily chart)

having spent years trying find the best chart to trade from I have finally decided on the daily. I would really like to consider opinions from similar traders esp which indicator is best,
My plan is set 1 trade per day at 0500 GMT on GBP/JPY so as to catch the close of biz in far east and open of London.

Which is the best indicator for the daily chart ?