What has always been helping me whenever this happens is to step away from the screen of my phone or laptop( as the case may be). I also try to stick to a plan, once I have set my entry and exit I try very much not to second guess cos the market is moving. Journaling my trade also helps me to notice patterns in my emotional response.
It's really not an easy one, but learning to stay calm and focused has really helped make better decisions. How do you manage you emotional ups and downs that comes with trading, love to hear your responses.
I keep saying this, one of the major problems that a trader has to deal with is his psychology, this thing most often affect the outcome of your trading success and one of the best ways to improve ones psychology is to have a an extra income generating scheme aside trading this thing gives you freedom in the market and also confidence to trust your analysis. The major thing affects traders is the fear of losing and this fear leads them to lose more.
It is does without extra income that usually do revenge trading after losing, your idea of journaling is the best way and you need to also back test your trades again to see where the problem lies