Somebody usong this strategy and could give us advise?

someone want to build the best arbitrage system with me?

using Zorro naturally!!

I have tried broker arbitrage using the same asset between Oanda and IG but was not successful. I used Demo account to play this. The prices triggered is late. I think one possible factor is connection speed. It can be that this strategy is untouchable for retail traders.

Oanda and IG are brokers slow. After I will send you some trades.
Have you used the example code present in the zorro manaul?

Yes, I have used the example code in the manual. I think connection speed is more related to the hardware than brokers. So there should not be any problem with Oanda and IG.

Mmmmm I'm not agree

Following the manual for the arbitrage system I can place the order on 1 broker and not in the second broker....why? I have 2 istance of MT4 and I have 2 different broker account but I see can't open order in the second broker. Why?
I followed step by step all instructions present in the manual for join 2 MT4 but without result.

What I wrong?

I did the same and ... it works, also with 2 accounts both with MT4. How should one give you any help without knowing code and error messages it produces?