If you just mean limit orders set to buy at a certain price? Yes you can. These are called buy-limits.
Buy /sell limits are called spot contracts. We trade currencies for spot prices. We can also sell markets that your Forex broker offers you for specific spot prices. We do all these using the trading platform provided to us by our broker.

You can also profit each way at the same this way. This is called hedging

You can also set stop-limits or stop losses where ever you like so that your trade automatically closes and your position does not lose anymore money.

You may also put take profits so that your positions will close at a certain profit amount that you have set.

We use stop-limits and buy-limits to close position before the market price reverses.

I will be talking more about Forex hedging in the final part of this series.

Edit. I decided this question had to be answered properly. Not only that, I have decided to add it into this part of the series under Risk Management.