Yadix is best broker for ECN trading, conditions, costs and execution!
They have three ECN accounts that any trader can afford to trade ECN
Scalper - Spreads 0 pips - commissions $5 per 100,000 traded
Pro - Spreads 0 pips - commissions $3.50 per 100,000 traded
VIP - Spreads 0 pips - commissions $2.50 per 100,000 traded
Average speed (with London VPS) 7 ms
Slippage low, also positive slippage
No minimum market distance for stop loss and take profit
Its a very good STP broker.