Here a documentary about the FX marked in 1985 (31 years old). It's about 2 dealers and a wealth manager from Hong Kong, London and New York. It could give you some perspective what were the realistic returns from prop trading from the top dogs back then.
You can fast-forward to 26:25 min: "...in the ten, exhausting hours Richard has been to work, the pound has moved up and down 2 cents. He made just under 100,000 GBP for the bank, buying and selling 750 MILLION of them" [that means 0.0001(3) % return from multiple trades]
" Ronnie, Richard an William, between them made over a 100,000 GBP through this this day buying and selling more than 1 BILLION DOLLARS..."
Basically in the video they are gambling on the news, disguising trades and the only differences with the retail traders are the amounts and leverage - trading the bank's money probably means 1:1 leverage ratio.
Inserted Video
You can fast-forward to 26:25 min: "...in the ten, exhausting hours Richard has been to work, the pound has moved up and down 2 cents. He made just under 100,000 GBP for the bank, buying and selling 750 MILLION of them" [that means 0.0001(3) % return from multiple trades]
" Ronnie, Richard an William, between them made over a 100,000 GBP through this this day buying and selling more than 1 BILLION DOLLARS..."
Basically in the video they are gambling on the news, disguising trades and the only differences with the retail traders are the amounts and leverage - trading the bank's money probably means 1:1 leverage ratio.