@fabulist, thank your for taking a look and giving real feedback. it is very much appreciated.

in no particular order, the questions you have raised.

Why 6 seconds. cex has a 600 requests per 10 minute limit on their API otherwise they ban the caller. i make sure that I am under that

I already know that others are using triangular arbitrage, in the stock market and I suspect they are also doing it on cex, otherwise I would be getting large numbers of profit opportunities rather than say 20-60 a day i am currently getting. So others doing something similar cant be controlled.

out of date opportunities i am thinking of doing. i can simply report every arbitrage i find to let people see what is happening. Although currently the trial which doesnt need people to even sign up or use cex shows it live as it happens.

I think you are also right into going into the math/detail. originally i have been thinking about keeping it fairly "high" level because most won't want to learn the math, but it may give them a greater sense of it being a real opportunity

thanks again fabulist