You won't even think about trading under pressure if you are learning to trade the right way. You cannot trade under pressure if you read trading books, have mentors, be a part of peer group of traders. The people who are likely to trade under pressure are those who are greedy and want to make it a get rich schemes. Trading for them is short term and not a long term endeavor.
We have everything within our exposure because the market is wide enough. Short and longterm trades are important, profitable but also consider to be risky if one failed to match with the market. There's absolutely good feelings that follows when one is aware about his mistakes and correcting them with ease principles. Traders that have undergone trainings and know specifically the basis of the market, they're aware about the weak and strong zones to trade. Trading under pressure is entirely a different angle a trader tends to find himself.
I didn't understand you correctly. We all know that we shouldn't trade under pressure. But you say that traders find themselves under pressure.
But yes, those who are aware must know very well which is the right time and place to trade. Experienced traders find a way to make profit in all situations. But as far as I know, most traders go to the sidelines when they are under pressure so that they don't lose their money.