I believe you missed the point here FTP.
What Dominic Gilbert meant was that you can have a 30% success rate, and still be profitable.
In fact many good traders are...
The simple math behind that is, that if 30% of your trades are successful, but you gain 4times the money compared to the trades you lose than you'll still be up in the long run.
e.g: you win at least 4% at every good trade and lose 1% at every bad trade.
On this planet 51% is a profit of 1%. If you profit even one percent, that is more than you started with.
If you are aware of some other mathmatical formula where 51% is not a profit and 50% is not break even and 49% is not losing, please enlighten all of us.
Until then, shoot for 51% at least (or 50.00000000001 if you have the time).
'Developing a trading plan with more than 51% success rate.'
Agree with everything else. But the strike rate is dependent on the strategy at hand (unless you`re referring to your own rules)
Nothing is impossible, if there's a will there's a way.