I copy the chart above as a picture paints a thousand words.

It’s 9 dma Simple and Weighted, only to be used with a proper money management strategy.

Note the red arrow where dividend xd dates interfere with the short term direction of the chart. This is not a foolproof way of trading just something to assist u before u trade as u would have been whipped sawed at the blue arrow. Use only if u have decided to buy a share and then use the chart as an entry an exit point.

Using the chart u would have bought around 505p, collected the dividend of 17p, u may have sold on the xd date or not. If u did sell u could have bought back from the chart. I am not authorised to give buy or sell advice, so u need to make your own decisions about your hard earned.