There are two ways to remove technical indicators from a chart window. The easiest way is to just select the indicator, by clicking on it or tabbing to it, and then hitting the "delete" key on your keyboard. Alternatively, you can click on the green trashcan icon 
on the charting toolbar, select the element you would like to delete from the list that presents itself, and then click "OK".
Default preferences for technical indicator in the past were limited to one set of default settings per indicator. "Setup: Preferences: Charts: Multi-pane Charts: Technical Indicators" was (and still is) the place to specify your default settings for each of the indicators you utilize. Now, the default preferences can be setup from any technical indicator preference window. Often it is desirable to have several sets of preferences per indicator, especially with some of the more complex indicators where there may be many useful combinations of settings that are used often.
There are two indicators which will accomplish this: Session Statistics (SESST) and Mixed Periodicity Data (MPD). Session Statistics is a more reliable and efficient method and will be discussed first. One thing to keep in mind when trying to decide between the two methods is that MPD uses the daily bars while SESST uses the actual intraday data. Thus, MPD will always reflect the data present in the daily bars (which is generally the globex session data for futures) while SESST values will reflect the session to which the chart is assigned (can reflect either day session or globex session data for futures contracts).
I suspect that these indicators may be "cumulative" indicators. A cumulative indicator us one that builds upon itself (it's own previous value). Any indicator involving an exponential smoothing fits into this "cumulative" category.. When an indicator is cumulative, its value is dependant in some respect on all previous data elements that are considered/loaded for the calculation. While the chart is loading a certain number of bars (depending on the charts viewing period), the custom column is loading a minimal number of bars for efficiency purposes.
There are two indicators that will accomplish this: Session Statistics (SESST) and Mixed Periodicity Data (MPD). Session Statistics, a more reliable and efficient method, will be discussed first. One thing to keep in mind when deciding between the two methods is that MPD uses the daily bars while SESST uses the actual intraday data.
You can do this currently with an "Info Box"...having it show only One Pane's indicator values...and pointing it to the pane number that contains the WPR indicator. However, you can't currently hide the line that shows the date/time. This might be an option we could add to Info Box for the next release, giving you the ability to easily show only one indicators values as large as you want in a one line text box.
The 13 minute video demonstrates the indicator scope options available technical indicators in multi-pane charts. There are four scope choices
To move or copy an indicator or button from one chart to another, use standard copy/paste commands. Right click the indicator or button and choose copy. Then go to another chart window, right-click in a destination pane and choose "Paste". Macintosh users will use Command-C and Command-V for copy/paste shortcuts, and Control-Click for right-clicking with a single-button mouse.
This 6 minute video demonstrates how to easily move technical indicators from one multi-pane chart to another while retaining the indicator's settings. Methods include Drag and Drop, Copy/Paste, and the Make Default method
Yes. Right-click on a button, and choose either Cut or Copy from the popup menu. Both Cut and Copy will copy the button setup to the clipboard. Cut has the additional affect of removing the button from the pane in which it presently resides. Then go to another chart window or to another pane in the same chart window, right-click in the pane and choose "Paste".