William Delbert Gann, the trader who developed his set of tools to diagnose the market movements, precisely. We have tried optimising his mathematical equations for the day traders. This came up as an idea, as one of our client had to religiously plot the new values everyday after the session for the next day and, doing so was definitely cumbersome. We did so for the ease of retail traders to make the best use of this tool. Of course, you might notice some discrepancy in the values if you compare our version to the other's, but this one relates well with the price-action.
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This will automatically plot the GANN on chart; interestingly you can trace the next day's values right after the day's session is over, perparing you well ahead in time for the next day.