In 10.4, a new option was added to the TPO Indicator titled "Compute Only Last X Days". If this option is not checked, the TPO Indicator will default to show the last 10 days/profiles. If the user wishes to show more or less days, he may check this box and specify the number of days desired up to 120. This option was added for efficiency purposes. It can take several seconds longer to initially compute the TPO Indicator for longer durations than short ones. This initial computation comes into play when opening the chart, when initially adding the indicator to a chart, when switching periodicities, or when switching symbols. Setting this to a smaller number, only what the user needs, can really help speed up the loading of charts and switching of periodicities and symbols.
