Strangle trading theory is super easy to understand.
Investopedia;
For example, imagine a stock currently trading at $50 a share. To employ the strangle option strategy a trader enters into two option positions, one call and one put. Say the call is for $55 and costs $300 ($3.00 per option x 100 shares) and the put is for $45 and costs $285 ($2.85 per option x 100 shares). If the price of the stock stays between $45 and $55 over the life of the option the loss to the trader will be $585 (total cost of the two option contracts). The trader will make money if the price of the stock starts to move outside of the range. Say that the price of the stock ends up at $35. The call option will expire worthless and the loss will be $300 to the trader. The put option however has gained considerable value, it is worth $715 ($1,000 less the initial option value of $285). So the total gain the trader has made is $415.
Read more: Strangle Definition | Investopedia Strangle Definition | Investopedia
Best
Kas