Most traders focus on trying to learn the mechanics of the foreign exchange trade and spend their efforts on trying to find a utopian method for predicting movements. That is how it can be summed up. An utopian effort. Having said that, there are various trading tools to assist forex traders to predict the direction of the markets and such tools usually do quite an efficient job.
In the stock market you can either buy fast (market order), think about the hare in the hare and tortoise story or slow (limit order) like the tortoise. This article explains in detail what are market orders and limit orders and also the fundamental differences.