Can you enlighten as how do you use Tick Volume? Some rolling window statistics which shows how trading activity changes over time?
On my platform ,as most, Tick data is just a count down, 200 if I'm using t200 chart -500 ticks /trades on the T 500 chart and so on, to the next opening bar, the only information i can gain is in volatile periods the count down to the next tick bar is quicker, which is not much interest to me, and the data is only broker by broker dependent as the FX market is unregulated tick dater will be unreliable , unless you are trading futures. But what i look for is the waves in the market driven by trades placed in the market so the bars are by actual trades and not time. What i am saying is the Tick volume is no use in my trading strategy, but the Tick chart itself i find easier to read over time charts ,coupled with the strategy i use.
Now you can trade XAUUSD with many forex brokers, the only question is the size of the spreads and the quality of order execution. Try Exness or fxopen, they have good trading conditions and instant execution.