about BB filling between two bolinger band in order to recognize easily about MA this script make possible to show 4 different length of MA and you can choose whether using SMA or EMA; if 4 MA is more than enough you can hide one of them by uncheck "show" button
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fixed a bug which is calculating unexpectedly. Therefore main part is the same with previous version.
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fix another bug and add linear channel function which can be chosen to show or not