How to get ATM strike to actual option symbol with CE/PE and with expire selection ?

Question

AlgoDelta Team

I have already implemented dynamic strike selection (ATM/ITM/OTM) and also handled strike gap while working in my Super trend algo.

Now I am stuck at the next step — I have something like:

NIFTY
19900 strike
CE

But I don’t know how to convert this into the actual tradable symbol or instrument token from the broker.

How do I get this properly for order placement?

Posted Apr 24

Reply

Answer 1 · 2026-04-24T22:43:00+05:30

Support AlgoDelta AlgoDelta Support · Apr 24

So, you can find it from the instrument list provided by broker.

Root idea is that broker gives the full instrument data (CSV/list).

We can filter it based on symbol, Strick, expire, option type (CE/PE).

So, the logic is simple we will select the most common Strick gap.

Below is the code you can refer:

def find_option(instruments, name, strike, option_type):
    filtered = []
    for ins in instruments:
        if (
            ins["name"] == name and
            ins["instrument_type"] == option_type and
            ins["strike"] == strike
        ):
            filtered.append(ins)
    if not filtered:
        return None
    # pick nearest expiry
    filtered.sort(key=lambda x: x["expiry"])
    return filtered[0]

# Sample instrument data
instruments = [
    {"name": "NIFTY", "strike": 19900, "instrument_type": "CE", "expiry": "2026-04-30", "token": 111},
    {"name": "NIFTY", "strike": 19900, "instrument_type": "CE", "expiry": "2026-05-07", "token": 222},
]

result = find_option(instruments, "NIFTY", 19900, "CE")

print(result)

Verified Solution

Ok, got your point and I get the ATM Strick properly. Thanks for the code. – Sejpalsinh Jadeja Team Jun 16

How to get ATM strike to actual option symbol with CE/PE and with expire selection ?

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