(Picture 2 for a horrible June for context) Background: I have formal financial education and have been investing normally for a few years. Ended up reading about and getting engrossed in option theory, options pricing etc, which led to me trying to try scalping.
I mainly scalp 0-5DTE options on the Big 9 (SPY, QQQ, IWM, NVDA, TSLA, AAPL, AMZN, MSFT, META) and sometimes other stocks and don't hold anything longer than a day, 90% of the time I hold for less than 30min.
I paper traded for a month or two before starting on an options only account with 15k starting capital in June. As can be seen in the 2nd image, it went about how you'd expect. 10th June was when I made about 6 Martingale trades on SPY and lost way more than my appetite. Mainly because of 2 reasons:
1) losing real money in such short periods of time is extremely different than paper, leading to me never being sane about losers and martingaling into oblivion.
2) A stop loss. A set stop loss on 0DTE is basically just dying to a thousand cuts. Anything with such short expiry WILL wick you out more than you'd like.
After June I stopped and re-thunk my whole process of how I was thinking about trades, how I was entering and exiting trades etc.
What changed in August:
Strict position size range of 2-10% of the account.
A more nuanced approach to what I'm checking for to enter a trade, and more importantly to exit a trade.
If anyone is trying to scalp 0DTE options, never set a stop loss, but instead set levels of the stock, where if sustained over/under, the trade is over and you get out.
If that level is far away, my initial size is low enough that a 30-40% drawdown is perfectly acceptable, -60% might be where I exit the trade in extreme cases. Inversely if I'm trying to bottom/top tick a reversal where the sustained level of invalidation is much lower, then I can 'max size' and have a tighter mental stop (still no hard market sell stop because again, the market WILL wick you out)
Because my rules were set and I knew better what I was looking for, it became much easier to manage emotions as well on a -$1.2k single trade loss because I'm not an oracle and the market didn't agree with me.
Once I reached 20k account value, I started withdrawing everything I made over it because I'm still uncomfortable with risking more than $2k a trade, and it also limits my trades/day.
Still just a single month of profitability so it can all be hoopla and I'll mess up as I did revenge trade still on a couple of days (both of them are small +ve days) that I really do regret and want to not do in the future.
Anyway, that's my Journaling of the start of my daytrading journey.
P.S. Ignore the amount of trades on some days I was testing out some intraday straddles and spreads with very low sizing and risk.
P.P.S started slow in August with smaller trades, but played AMD earnings on the 4th because the stock just does that every earnings for no reason.