On first view it seems that 'day trading' nakowa has a zero expectation. But if he keeps going up and down like today then "divest at +1000, invest at -1000" is a profitable strategy.
Invest at - 5k, divest at +5k like yesterday.
You will make 20% profit daily
Or you'll get stuck divested at 5k and missing out on profits from 5k to 50k... (we can dream...)
I've made a change to the roll algorithm.
From bet 145,000,000 it will be doing:
hmac_sha512(nonce+':'+server_seed+':'+nonce, nonce+':'+client_seed+':'+nonce)
instead of the previous:
hmac_sha512( server_seed , client_seed+':'+nonce)
ie. using the nonce in 4 places instead of 1. sha512 is meant to completely change its output for any single bit change in its inputs, but it can't do any harm to change more than one bit each time.
Edit: it was pointed out in chat that this change is pointless, since even a small change in the message will (with overwhelming probability) result in a mostly different hash, due to the avalanche effect.