Risk warning
A course, not advice
OptionShaker is an educational tool. The examples, the calculations and the author's benchmarks (for instance 21 to 45 days, a 25% or higher return, a cushion of more than 5%) are there to learn; they are not investment advice nor a recommendation to buy or sell any security.
Options are complex products
Selling an option can lose far more than the premium collected. A sold put can force you to buy the shares at the strike, even if their price has collapsed.
The calculations are models
The calculator relies on the Black-Scholes model, without dividends, with exercise at expiry. Real markets can differ, especially for American-style options, which can be exercised at any time.
Your decision, your responsibility
Before any order, check your broker's terms and only risk what you can afford to lose.