What is working best for me in trading, after trying quite a few things including big single positions, in stocks which i know they will for sure bounce back based on fundamentals, is to keep a max of 10% per stock/commodity/etc and never going below 55% total margin(if at 55% I won’t open new positions anymore). This has allowed me to manage risk much easier so far as, if by any chance, the stock actually drops a further 10% or more I can easily take the hit and just wait it out a bit longer and, if I’m not at the 10% cap yet, can buy some more on the dips(I usually don’t max it out in a single position straight away as it can go down still, so just buy over time). It will also be easier to manage overnight fees/interest, as if its not doing as well as you had thought it would, you can easily just close the positions and take a loss instead of having to wait it out and incur fees and possibly a bigger loss. Plus, with diversity, some can make up for others so it kinda helps out with your margins. No super huge gains in a day, like everyone’s wishing for, but it has been working better overall for me so far. If this works out, I plan to use Cfd to fund my ISA 
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