All that prevents to get a plus on the stock exchange!

Recently, there have been many negative factors affecting the positive statistics of my trading on the Betfair Exchange. I will remind them for myself mainly to have in sight. I will be grateful for the comments and additions.

I conditionally share the reasons that give a negative result to the objective:
-power outage,
-malfunctions in the operation of the operating system,
-failures in the Internet,
-problems with the Betfar API,
-malfunctions in the terminal,
-a sudden breakdown of the computer,
-blocking the market by the exchange before the start time,
-calculation of a previously canceled bet,
-blocking the market in connection with the removal of the horse a minute before the start,
-cancellation by the exchange hedges,
-start before the scheduled time,
-and others are not yet known to me.

and subjective:
-correction of unsuccessful trade before the game in live,
-fear of losing money and greed,
-the hope that a losing position will become profitable,
-the lack of a systematic approach to trading,
-general fatigue,
-exacerbation of the disease,
-an excited or depressed mental state,
-use of trade in the form of "psychological candy" (now I feel bad, I will cut the money and I will get better),
-the use of alcohol or drugs that affect the response or an adequate perception of the environment,
-the dissatisfaction of natural needs,
-hunger, thirst,
-uncomfortable furniture,
-Incorrect lighting,
-problems with eyesight,
-involuntary movements and excessive tension of the muscles of the trunk and face,
-loss of attention,
-loss of concentration in the market,
-low speed of decision-making,
-low speed of motor reactions,
-mistake in choosing a market,
-error in the choice of the event (I wanted to put one on, and put it on another),
-mistake in the amount of the lot,
-poor knowledge of the capabilities of the trading terminal,
-error in the placement of the bet (wanted by, put against, etc.),
-roughness on the nail of the little finger of the right hand, clings a mouse pad,
-and other problems and errors that can be solved independently.

I would also highlight the lack of motivation to make a profit. For example, after a big win, I relax and work through the sleeves less aggressively than usual, and a good-natured attitude towards the market, in my opinion first leads to errors, then inevitably to losses. So not for long and become a budgetary!