High pressure and stress is a part of the trading environment. Stress reduction is not a viable strategy. The approach instead is to build a person’s resilience and ability to cope more effectively with the pressure and stress that they are encountering.
This is done by a process of exposure to the stressful events, and then recovery. The recovery process will prepare you to engage again but with a higher stress threshold.
Build your stress exposure over time by gradually building the demands on your trading — slowly increasing your position sizing, complexity of trades, diversification, etc.
Use relaxation techniques to enter a restorative state where your mind and body can recover.
Look after your nutrition, exercise, sleep, get balance in your life with friends, family, other hobbies.
Consistent performance is achieved when you have a healthy oscillation between positive peak performance states, and periods of recovery.