This is a story about the lessons learned as I began intra-day trading.
Beginner traders may have periods of consistent profits, but due to a hole in their trading plan, give up profits with a big loss. The big losses tend to stem from emotional decision making, rather than sticking to a planned exit. Occasionally fat fingering (mistakenly placing or leaving an order) is the cause, though these are perhaps 1 in 50 events vs. emotional trades. The emotion tends to be a fear of being wrong, fear of taking a loss, or clinging to a bias.
A common lead up to a big loss is when you start with a
larger loss than normal (e.g. 1 to 2 std deviations from normal),
and your risk increases to make up for the loss. If the
trade fails, you have an even larger loss, which can further
increase risk taking, and potentially further the losses
much more.
Having three losses in a row is not terrible or too
surprising, but if they are magnified 2x, 5x or 10x, it's
unlikely that normal size trades will be impactful (if
profitable) for 2x, 5x or 10x or longer. In
other words, it takes much more wall
time trading at normal size to make up for the loss.