Billionaire Ray Dalio attributes meditation as the biggest factor for his success.
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Meditation, if done regularly, can prepare the mind for any activity. It has nothing specifically, but everything generally, to do with trading.
In a previous life I was a teacher of TM. So I'll give you a sense of it. TM involves a mantra, which is just a simple word/sound. You can get the same idea with another word/sound.
Start by first sitting quietly in a comfortable chair. Breath easily to relax.
Close your eyes. Take it easy. Everything is done easily. Slowly and easily start to think of the word "One". Slowly and easily repeat "One" to yourself. Don't force it. Continue to repeat the word. Let it just become a thought. Slowly repeat, repeat. Now, here's the trick. When other thoughts come into your mind, don't bother with them. Don't focus on them. Just slowly, and very easily, return to "One". Don't force it. Just easily return your attention to "One". Continue the process, very easily. When you get other thoughts, just return to "One". Do it for ten minutes, and come back to awareness very slowly.
The biggest reason people fail at enjoying meditation is because of the feeling that they need to rush, or force themselves to focus on the sound/word. It should all be very, very easy.
The only magic to this is not forcing anything, but taking the time to do it regularly. What you're doing is giving your mind a point of easy focus to help it settle down to a quieter state.
It's very simple. Nothing mysterious about it.