AutoTrader parameters are given in autotrader.afl and autotrader-button.afl
It can disable in that afl and use in strategy AFL
AT_SYMBOL is given in Parameter. By default it is need to give in Parameter. So it can change as AT_Symbol = Name(); this will automatically take symbol name, no need to enter in Parameter.
You can disable AT_QUANTITY also and define the quantity as per risk or trade value.
Before use the following AFL kindly check them after market ours and place dummy orders and verify order place correctly and in live market check with 1 quantity and verify. Then only use auto.
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Algo BracketOrder
To know the various functions of Autotrader use the following AFL in Exploration
For option symbol mapping can do in AFL itself. Following sample for VBIZ