Thank you for writing.
The reason for this behavior is because the indicator values are calculated based on previous periods of time and the first points are used to calculate the first value of the indicator. That is why it doesn't start from the beginning of the data set. You can solve this by changing the minimum range of the x axis:
xAxis.range.minimum = min;
Another option is to manually create the x axis specifying appropriate minimum and maximum:
TKChartDateTimeAxis *xAxis = [[TKChartDateTimeAxis alloc] initWithMinimumDate:[NSDate dateWithTimeInterval:60*60*24*7 sinceDate:minDate] andMaximumDate:maxDate];
I hope this helps.
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