You can use this case for a Forex Broker Benchmark on hardest Trading conditons with several good Brokers compared to each other. Here you can find this scenario with some myfxbook statistics: How to compare Forex Broker - Benchmark Test
A customs Analysis with EUR/USD shows:
EUR/USD works!
AUDUSD works not
EURJPY works not
EURUSD works not
GBPUSD works not
USDCAD works not
USDJPY works not
XAUUSD works not
AUDUSD works not
EURJPY works not
EURUSD works not
GBPUSD works not
USDCAD works not
USDJPY works not
XAUUSD works not