Ok, here we go:
Depending where you entered the market, you will have a clear BE target on the up and down side of the trade. Here you act the way you decided to do so from your trading plan. Different ways to act
and to define that, but let's stay with your question.
1. Assume this BE on the down side is around 8095, you can square of the short 8300 put to take out the risk you face and can handle on this leg.
2. Or you also could square of the whole position. This then would be end of the story for this trade with this defined rule.
Next step what you want to do, you decide according to what market shows and what you have decided to fill your entry rules for what ever trade/system.
1. If you think that market will further move down for what ever reason and your entry rules for a long put are filled, you could buy the atm 8000 PE at 100. Risk is defined with 100.
2. The same for this: If your entry rule for a short straddle are filled again, you also could enter a new short straddle atm.
3. Or you could short a naked call with your defined risk profile and so on.
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Now next step according to your example:
You are now in the new trade and market goes up. In your mentioned case we would talk either about a situation with:
1. The long 8000 PE,
2. Or with the long 8000 PE and the current, old short straddle.
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Now market moves up again. Depending on above first or second scenario:
1. You keep the long 8000 put and short the 7900 put = Put credit spread. No buy of call.
2. Or you square of the short 8300 call leg from your short current straddle and keep the current put credit spread. (Put credit spread as you got 149 for the 8300 put and spend 100 for the 8000 put) and no buy of call.
3. Or you keep any of the mentioned put credit spreads and buy the 8400 call leg if your entry rules for a long call leg are filled.
4. Or you keep the current short straddle, keep the new long put and add the long call.
That should do for the moment, as other wise it gets to complicated. Each of this four just mentioned above scenarios has its own value and risk profile. There is no just one way and all depends on:
- how deeply you understand your risks,
- how much risk are you willing to take,
- how deep pocket are you to fill the margin requests in your place,
- how flexible are you with your option strategy knowledge to act according to what market shows,
as what I just posted is related only to your question, mentioned legs and mentioned scenario and not to what else all could be done in this situation.
Take care / Dan