Most 0DTE bots are designed around exits. You set a profit target at 35% or 50%, and the bot takes the money and walks away. You set a stop loss at 50% or 100%, and the bot protects you from the worst.
This bot doesn’t have either. The 2:00 PM Iron Fly enters at 2 PM every day, sells the ATM straddle, buys $40 wings for protection, and holds until 3:59 PM no matter what. There is no profit target to trigger early. There is no stop loss to save you. You are fully committed to wherever the market decides to close.
Over four days — Monday through Thursday — this bot produced results that show exactly why that philosophy is both brilliant and brutal.
| Day | Entry | Exit | Credit | P&L |
|---|---|---|---|---|
| Mon Apr 28 | SPX $7,134 | SPX $7,142 | $11.30 | +$520 (+46%) |
| Tue Apr 29 | SPX $7,129 | SPX $7,130 | $20.38 | +$1,835 (+90%) |
| Wed Apr 30 | SPX $7,194 | SPX $7,212 | $14.52 | -$348 (-24%) |
| Thu May 1 | SPX $7,251 | SPX $7,233 | $10.00 | -$590 (-59%) |
| Net: | +$1,417 |
Monday, April 28 — The Quiet One
The week started with a trade so uneventful it’s almost boring to write about. SPX opened the 2 PM window at $7,134, and the bot sold the 7135 straddle with $40 wings on each side, collecting $11.30 in credit.
What followed was 119 minutes of not much. SPX drifted between $7,132 and $7,142 — a 10-point range — and barely tested either side. The position opened at +0.9%, drifted between +5% and +11% for most of the afternoon, and then started climbing steadily as the clock wound down. By 3:30 PM it was at +34.7%. By 3:56 PM, +52.9%.
At 3:59 PM, SPX closed at $7,141.52. The short strikes were at 7135. Six points of separation at expiry — not a perfect pin, but close enough for +$520.
Nothing went wrong. Nothing even looked like it might go wrong. This is what a good Monday feels like when you’re betting on calm.
Tuesday, April 29 — The Pin
Tuesday was the trade that makes you want to run this strategy forever.
The bot entered at 2:00 PM with SPX at $7,128.79, selling the 7130 straddle. Something immediately stood out: the credit was $20.38 — nearly double Monday’s. The implied volatility was significantly elevated. The market was pricing in more movement than Monday, which meant either a big opportunity or a big problem.
The first nine minutes suggested a problem. SPX dropped from $7,128 to $7,112 — a 17-point move straight into the put side. By 2:09 PM the position was at -12%. The short put at 7130 was now 18 points above the market. If SPX kept falling, this was going to get ugly fast.
Then, gradually, it reversed. By 2:17 PM SPX was back at $7,118 and the position had recovered to +2.5%. By 2:21 PM, +8.7%. By 2:51 PM, +21% and climbing.
What happened next was one of those afternoons that defines the strategy. SPX slowly, almost magnetically, drifted back toward 7130. By 3:00 PM it was at $7,129. By 3:30 PM, $7,131. By 3:50 PM, +71.4% and SPX was sitting at $7,130.
The final tick at 3:59 PM: SPX @ $7,129.60. The short strikes were at 7130. The market closed 0.40 points away from a perfect pin.
The exit debit was $2.03 to close all four legs. Profit: $1,835. Return: 90%.
That’s what this bot is designed for. An afternoon where SPX finds its level and just sits there while time does all the work. Tuesday delivered it in textbook form.
Wednesday, April 30 — The Drift Up
Wednesday reminded you that the market doesn’t owe you anything.
The bot entered at 2:00 PM with SPX at $7,194.17, selling the 7195 straddle. From the first tick, SPX was above entry — $7,199 at 2:01 PM, pushing the short call immediately into negative territory. The position opened at -11.5%.
For the next 90 minutes, SPX held in the $7,198–$7,211 range. Sometimes it dipped back toward 7195 and the position recovered to breakeven. Then it would push higher again. The bot watched. It doesn’t second-guess. It just monitors.
By 3:00 PM the position had recovered to -3.3%. That was the closest it got to flat for the rest of the afternoon.
From 3:00 PM onward, SPX started climbing. By 3:11 PM it was at $7,213 and the position was at -32.9%. By 3:14 PM, $7,216 and -50.3%. The final 45 minutes saw SPX grind between $7,211 and $7,217 — consistently 16–22 points above the 7195 short call.
At 3:59 PM, SPX closed at $7,212.16. The position closed at -24%, a loss of $348.
No stop loss would have fired — there was none to fire. No early exit would have been triggered. The bot held the full two hours and took the loss cleanly.
Thursday, May 1 — The Mirror
If Wednesday showed you what happens when SPX drifts up 18 points, Thursday showed you what happens when it drifts down 18 points. Same distance. Opposite direction. Similar damage.
The bot entered at 2:00 PM with SPX at $7,251.25, selling the 7250 straddle. Credit: $10.00 — the lowest of the four days, which in hindsight tells you something. When the market prices in very little movement, you collect very little for being wrong.
SPX started sliding almost immediately. By 2:15 PM it was at $7,242 and the position was at -8.8%. Then it froze — the data shows the same price ($7,242.515) repeating for seven straight minutes, suggesting the market had settled into a temporary equilibrium or there was a data lag.
When SPX resumed moving, it kept going down. By 2:35 PM it was at $7,238 and -28.5%. By 2:46 PM, $7,234 and -61.8%. The short put at 7250 was now 16–18 points in the money.
Then something interesting happened. Between 3:12 and 3:52 PM, SPX climbed back toward 7244–7248. The position recovered from -70%+ territory all the way back to +16.7% — sitting there quietly for 21 consecutive minutes from 3:18 to 3:52 PM. For a long stretch, it looked like the recovery might be real.
At 3:53 PM, SPX dropped from $7,244 to $7,234 in two ticks. The recovery evaporated. The position closed at -59%, a loss of $590.
The final irony: the bot spent a full half hour between 3:12 and 3:52 PM at +16.7%. On any other strategy, that’s a profit exit. On this bot, it doesn’t matter. The rule is 3:59 PM, and 3:59 PM it was.
The Week in Perspective
Two days where SPX barely moved: +$520, +$1,835. Two days where SPX moved 18 points: -$348, -$590.
Net: +$1,417.
The math of this bot is simple and unforgiving. When SPX closes near your short strikes, you collect almost everything. When it moves 15–20 points away, you give some of it back. The size of the wins when it works — particularly a 90% return on Tuesday — is large enough to absorb multiple losing days.
What’s harder to quantify is the experience of sitting through Wednesday and Thursday knowing there’s no exit. On Wednesday, the position was at -50% at 3:14 PM. Most people’s instinct is to close and stop the bleeding. The bot stayed in. It ended at -24%. The position improved in the final 45 minutes, not because the market cooperated, but because time kept decaying even as the loss lingered.
Thursday had 30 straight minutes at positive territory. A manual trader would have taken that +16.7% and called it a day. The bot held, and watched it turn into -59%.
That’s the deal you make when you remove the exit button. Some days you leave money on the table by holding through a recovery that then reverses. Some days the hold pays off because time finishes the job. You don’t get to choose which kind of day it is — you just run the rule and live with the outcome.
This week, the rule produced +$1,417. Next week might be different.
Trade logs from a mechanical bot in monitoring mode on SPX. No profit target. No stop loss. Exits at 3:59 PM only. Not financial advice.