feat(FutureExchange): iterate the orders from the end makes the simulation run faster

[yakir4123]

I've notice that there are some strategies that works very fast and some very slow while they use the same indicators.

The difference was if i change the orders every candle.
The base code iterate over all of the orders from the beginning to the end while personally i dont know why its needed, beacuse most of the orders is always at the end. On my strategy it makes this loop iterate O(n**2) on the number of candles!

Simulation of 6 months, timeframe "5m"
Simply search from the end make a major difference for such strategies.
Base code:
173s

where on_order_cancel is 45s and getitem (again probably because of this loop) another 38s

With this change:
60s

[saleh-mir]

If I can't believe this simple change had this much impact. Brilliant.