In technical analysis, majority of the patterns were first observed visually and then the rules made. Observing this interesting phenomenon on BNF over the past one month.
Any strong up day on BNF is immediately followed by a gap down open from the previous closing

So any upmove /upday is almost never having any follow-up buying the next day. Unless this pattern gets broken by 1-3 days of upmove after a strong closing, BNF looks extremely bearish. The logic of BNF seems to be " will kick your ass if you take bullish positions overnight" 😀
Jokes apart, if you want to understand the logical basis of patterns, this book is still the best :
Technical analysis of stock trends by Edwards and Magee

https://t.co/O8yWYpWC2W

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Ok here is the explanation. Grab a cup of coffee and read on. If you have not read/noticed this, you will see intraday options movement in a new light.


Say we have two options, one 50 delta ATM options and another 30 delta OTM option. Normally for a 100 point move, the ATM option will move 50 points and the OTM option will move 30 points. But in a high volatile environment, the OTM option will also move nearly 50 points

To understand why this happens, first understand why an ATM option is 50 delta. An ATM option has the probability of 50% of expiring as ITM. The price just has to close a rupee above the strike for the CE to be ITM and vice versa for PEs

Now think of a highly volatile day like today. If someone is asked where the BNF will close for the day or expiry, no one can answer. BNF can close freakin anywhere, That makes every option of an equal probability of being ITM. So all options have a 50% probability of being ITM

Hence, when a huge volatile move starts, all OTM options behave like ATM options. This phenomenon was first observed in the Black Monday crash of 1987 at Wall Street, which also gave rise to the volatility skew/smirk

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