I have noticed that most charting services have 7 period hourly charts. I am a premium subscriber to StockCharts and Alpha trade...both have 7 period hourlies.
I find it interesting that there are 26 periods to a day on their quarter hour charts which equates to the correct 6 1/2 hour day.
A bit scary when I have been using hourly charts to identify short term buys. My IQ is not high enough to figure out the impact but crudely 7 period hourly charts increases the error by about 8%.
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