ANSWER:

The correct opinion is, it should be recited after salam. You can read it from a paper or a book. 

can i RECITE the DUA of ISTIKHARA seeing from a book or paper before the salam or after the salam?

Prayer | January 7, 2018 5:57 am
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Sheikh in my country (Center Asia) peole raise and touch their ear lobes while saying takbir. Alhamdulillah, I don’t do so. But it’s extremely danger cuz the people who do so are salafi and this manhaj is banned and is called as extremist mazhab. Sheikh what do you advise me?
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Most people put on amulets, charms or taweez and also use metals like watches but are not watches they are actually charms, so if I pray behind such people when he is leading the prayer, is my prayer valid?