To slow down or even stop these "Short term or Day Traders". The ones that don't let a stock get to it's full price potential should be assessed a substantial penalty.
Something along these lines:
Shares held less then 30 days---------------80% Capital Gaines Tax on profits.
Shares held longer then 31 days but less then 75 days---------#$%$ Capital Gaines Tax on profits.
Shares held longer then 76 days but less then 120 days---------------40% Capital Gaines Tax on profits.
Anything after 121 days ------------------Include gain as part of their Gross Income.
Any loss would be treated as it is now and can be used against their future stock purchases.
Short term trades and "shorting" are not evil enough to warrant the kind of confiscatory tax rates you are suggesting and as often promoted by various Obama/Biden sidekicks. I'm sure you don't want to be associated with the latter.
These sales are all classed as short term capital gains and are tax like ordinary income from 10% to 35%. Capital gains are the profits from a a capital sale. If there is a loss it is classified as a capital loss. Equities held over 1 year get the favorable capital gains tax rate of 15%. Any equity held one year or less the gains are treated as ordinary income.