If you sell shares owend in your own name then there is a CGT disposal - unless I am missing/missed something? Subject to income you can compensate for these gains via your income tax relief on your RA contributions - subject to percentage and maximums. But if you are going to act then you have little time to clear funds!!!
Once you reach the point when you start to draw down an income
eg via a living annuity then the extent of your actual income tax on income will depend on your level of drawings and other reliefs...
What is interesting (?) is that the Reg 28 requirements that relate to funds pre retirement - apparently don't apply - so you could have a post retirement
portfolio where the asset class exposure is not limited - as in a max of 75% in equities and only 25% offshore - if my memory serves me correctly. BUT you
must consult with a CFP - not some idiot broker or repreentative. And pay fees - not commissions for your advice.
Down 0,51% according to this site. Anyway, check out https://justonelap.com/etf-csew40/
Thus, npn today is down 1.54% so will bring the top40 down quite heavily due to its heavy weighting in the top 40 according to market cap. However, it only represents 2,5% of this etf so does not have a big impact.
There is an Average True Range indicator on the new IRESS viewpoint platform. This will allow you to view charts of instruments in 2015 and see what the ATR was on any given day.
If you are looking for raw data in spread sheet format, you would go to the quote page of any specific stock and click on 'price history'. This will give you a excel spreadsheet of daily price history and you can do your own ATR calculation.