I only use the 200 sma if the share has broken through all other support lines. A break below the 200 on good volumes is a sell signal.
CML is the only share that I know of that respects the middle (20sma) BB and the lower BB.
Other stocks might respect the 30 or 50 sma. You just have to find the right one.
The charts you use don't work on the 2y and longer.
On your charts to get the sma that you want, choose "sma" and the 13 day ma will show. To change it, tap on the sma in the block then tap on the number 13 that comes up. Delete it with back space and type in 50 or 200. Now tap on "update". Done.