EUR/AUD SL executed at FOMC time illegal?

I wanted people's thoughts on whether something like this is legal.

I was already in a position short EURAUD September 18th at 13:45 just 15 mins before the FOMC announcement. My Stop Loss was at 1.4311 and within 2 mins after the FOMC announcement my SL got triggered at 1.4321. The highest price printed(according to their chart and others) at the time of the announcement was around 1.4290.

How can my broker execute a SL 30 pips away from the highest price printed on the charts? is this normal?
See attached screenshot

The spread was widened during such a critical news announcement. This is what stopped you out 30 pips away.

I know that the spread would widen.
yeah, but the chart doesn't even show it hit passed 1.4300 on any other brokers as well.

and imagine how many orders were sitting around that whole number 1.4300. if my stop got triggered for real a whole lot of buy stops and sell stops would've been triggered.

Welcome to FOMC hell - you'll see the same thing happen on NFP. Avoid these events like the plague as spreads go insane; in fact I cancel all of my pending orders on these days as well as cover already active positions to break-even. What you see printed on MT4 is the bid price, which is what you sell at. You can't see the ask price based on that, you'll either need to use your broker's platform or send them a ticket requesting what it was at the time. 30 pips is pretty high but not unheard of for spread widening on major, major events. Given how much of a shock this announcement was, liquidity dried up fast and brokerages had to cover their risk.

You had a short trade which is exited at the Ask, what you see on your charts is the Bid. This is the reason why you don't see this price being reached on your charts, because your charts do not depict the Ask price (which is where your position was exited). If you had a chart using Ask data you would see where your trade was closed.

thanks for the explanation.

they gave me a list of transactions that occurred and there was even a 1.4340 printed which meant 50 pips away a trade was executed.
this just sounds ridiculous. everyone pulled their trades out.

This FOMC was highly anticipated. More so than previous ones. This was definitely not a time to have any open positions in the market.