Abnormal transaction price

Account number: 8******7. Order ID: 4698196. ValutradesSeychelles-Real-HK MT4 server time 2021.12.03 23:58:01, sell limit 0.05 XAUEUR at 1578.57 abnormal transaction price: order #4698196 sell limit 0.05 XAUEUR at 1578.57 Activated at price 1559.03. At that time, the lowest selling price of XAUEUR at that itme was 1575.49, but the transaction price was 1559.03. The selling price bid has nothing to do with the spread. Please give a reasonable explanation from the platform, thank you.

The following is the original recommendation

成交价格异常

账号：8******7
订单ID：4698196
ValutradesSeychelles-Real-HK MT4服务器时间2021.12.03 23:58:01，sell limit 0.05 XAUEUR at 1578.57成交价格异常:
order #4698196 sell limit 0.05 XAUEUR at 1578.57 activated at price 1559.03，当时XAUEUR最低卖价为1575.49，但成交价却是1559.03，卖价Bid与点差无关。
请平台给出合理解释，谢谢。