Inaccurate equity margin requirement for limit order

[LouisSzeto]

Expected Behavior

Based on the description of IB, the margin requirement of equities should be based on the stock value to be purchased, not the current value of the stock.
i.e. min{current / limit price} * quantity * margin factor should be required for limit order when checking submitted order

Actual Behavior

current value of stocks * quantity * margin factor is required for limit order

Reproducing the Problem

https://www.quantconnect.com/forum/discussion/14666/limitorder-requires-margin-based-on-current-close-price-not-on-limit-price/p1
backtest: https://www.quantconnect.com/terminal/processCache?request=embedded_backtest_4531fc381d219373d9293f0a38e43feb.html
The expected behavior was tested on IB.

System Information

NA

Checklist

• I have completely filled out this template
• I have confirmed that this issue exists on the current master branch
• I have confirmed that this is not a duplicate issue by searching issues

• I have provided detailed steps to reproduce the issue

[dhilgarth]

I'm no longer sure this is actually a bug. I tested it in a live account on Interactive Brokers and the margin requirement was always more or less the same, no matter the limit price I entered:

Limit 150:

Limit 15:

[Martin-Molinero]

Hey!

I'm no longer sure this is actually a bug. I tested it in a live account on Interactive Brokers and the margin requirement was always more or less the same, no matter the limit price I entered:

Yes we found the same behavior, we were actually using entry price for margin calculation back in 2019 and we fixed it to use current asset value, take a look at the refactor which has a detailed explanation and examples #3768.
Will close the issue for now 👌

[dhilgarth]

Great. I will do some more tests in the coming weeks regarding the exact margin amount between QC and IB. If I find any discrepancies, I will report them.