What's the max on average of ticks I can get per minute?

Hey Guys

What's the max average of ticks that I can get per minute? 

I want to save all ticks per symbol that arrives in time-frame one minute in memory.
About 9 currency pairs.

So in the worst case I will have 9 x 10,000 or more?
EXAMPLE: GBPUSD array has accumulate 10,000 ticks in the last minute.. In each record we have the bid & ask of the tick.

*I know the decision should consider memory I'm using, but just to understated what to expect. 

Thanks!!