Those values should be visible on your trading screen as you view the option chain. I use TastyWorks which was developed by the same team that developed ThinkorSwim, the TDA platform, only it is much more user friendly than ToS. If your platform does not display Open Interest, POP, and Probability of ITM along with the Greeks (which I do NOT use) then consider switching brokers. The Profit % is derived by dividing the projected profit, or premium to be collected, by the Buying Power required to execute the trade.
For example, if the trade is going to generate $1.50 per contract, (that is $150 in premium that will go into your account) and the Buying Power required to execute the trade is $450 then that is 150 divided by 450 or 33%. CAUTION: If you are doing trades expecting to make 33% each time, you are going to be disappointed because the market just won't allow you to do that very often. Your strikes are too close together and you will wind up adjusting one or both sides of it or you will have to exit early. So, instead of looking to take 1/3 in profits every trade, go for a more modest 15% to 20%, between 1/6th and 1/5th of the Buying Power required as your profit goal. But that is just one single parameter.
And remember, your funds are only tied up for six and one half hours, even if you enter the trade at the opening bell. If your trade is successful then all those funds, PLUS the premium you will collect on the trade, will be available to you in the next session. A 15% return in a single day ain't shabby and your probability of winning will go up considerably, from around 60% to somewhere around 80%; a 33% improvement in the probability of winning. It is not a linear jump.
For example, if the trade is going to generate $1.50 per contract, (that is $150 in premium that will go into your account) and the Buying Power required to execute the trade is $450 then that is 150 divided by 450 or 33%. CAUTION: If you are doing trades expecting to make 33% each time, you are going to be disappointed because the market just won't allow you to do that very often. Your strikes are too close together and you will wind up adjusting one or both sides of it or you will have to exit early. So, instead of looking to take 1/3 in profits every trade, go for a more modest 15% to 20%, between 1/6th and 1/5th of the Buying Power required as your profit goal. But that is just one single parameter.
And remember, your funds are only tied up for six and one half hours, even if you enter the trade at the opening bell. If your trade is successful then all those funds, PLUS the premium you will collect on the trade, will be available to you in the next session. A 15% return in a single day ain't shabby and your probability of winning will go up considerably, from around 60% to somewhere around 80%; a 33% improvement in the probability of winning. It is not a linear jump.