The arbitrage situation may arise for several reasons. Two most possible causes:

1. Price difference between liquidity providers
2. Latency due to imperfect aggregator/server/bridge/etc.

If hedge (2-legs) arbitrage EA open orders on price difference between liquidity providers (difference in banking prices)– it is not possibilities for broker to classify your trades like arbitrage trading.

Several our clients received very good results trading DAX with locking arbitrage. We would like to share with you some tricks to help you to make good profit as well.

We do not recommend to trade only DAX. It is much more safe to trade currencies as well. Because you do not need to adjust offset for currencies, but you need to adjust for CFDs and indexes, we recommend to add your brokers hedge pair 2 times, but with different magic numbers and labels.

Almost all MT4 brokers have protection against quotes and execution delays. These kind of solutions helps them to minimize risks, caused by trading on spikes and arbitrage. Several companies provide anti-arbitrage plug-in for protection against scalpers and arbitrage traders.

Usually anti-arbitrage plugins based on order life time and profit size determination. For example, if major of your trades was opened for very short period, your trading stile can be classified like arbitrage and anti-arbitrage will flag your account or change trading conditions for you in fully automated mode.