Options Straddle Strategy Backtester 140% APR for 2025

This script provides the most convenient manual tool for backtesting a straddle stagy in options.

The straddle is when you buy a call and a put option at the same price and the expiration date. You profit when the price movement at expiry (8 am UTC) in either directions surpass the price of the premium paid. The price of opening this straddle on ETH is always 1.6% of the current ETH price including fees.

In my example I use ETH options, I am buying a straddle at 8:30 UTC every day with the next day expiration date. In the script it looks like I am opening a long position on ETH at 8:30 and then close it the next days. We need to use 1 minute chart, chart time set to UTC for exact results and deep back testing function to go back in time.

Once the system generates a trade report - we need to download it and go to the list of trades sections, there we do the following:
1) remove all long entry lines leaving only long exit lines that have all the information we need.
2) We add one column that calculates the cost of premium for every trade: Position size*1.6%=cost of premium with fees.
3)We add a second column copying all Net PNL in USDT changing negative amounts to positive - since it doesn't matter for us which direction the move was towards.

The results are quite impressive: If you were buying straddles during 2025 that is not ended yet you will get 69% return on investment (11K paid in premiums, 19K return, 8K net profit). 2024 and 2025 combined: 53% (29 K, 45 K, and 15 profits).

Moreover, since you have the date of the trade in the table you can filter the results further to figure out if trading on some days is less profitable. Interestingly trades from Sun to Mon given are not profitable at -15% and most profitable days are Mon to Tue - 103%, Friday to Sat - 102 %. So if we remove Sun to Monday trades we will be at 89% for the first 221 days of the year or 140% APR.