Converting lot size between account leverage types - Double Check

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Stephen Cattaneo
73
Stephen Cattaneo  

Hello, I could not find this question in the forums already. I am just looking for someone to double check my math as i am converting orders between accounts with different leverage amounts.


Example 1. Amount of equity to keep accounts 1:1

The source account is 1:500 with 5k equity, to mirror the trades 1:1 in an account with 1:50 leverage i would need 50k equity? 500/50=10, 10*5k=50k?


Example 2. Convert an order of 1.5 lots size from a different account with different leverage.

Source: 1:500 with 5k equity.

Destination: 1:50 with 5k equity.


Using the math from Example 1, we would need 50k to be 1:1. The math is 5k/50k=.10, 1.5*.10=0.15. So the new lot size will be 0.15 to keep the same level of risk?


Example 3. Convert an order of 1.5 lots with same leverage but different equity.

Source: 1:500 with 5k equity.

Destination: 1:500 with 500(.5k) equity.

The math 500/5k=.10, 1.5*.10=0.15


LMK if anything is unclear. Just wanted to check this before i started to program anything.

William Roeder
18893
William Roeder  
Stephen Cattaneo: I am just looking for someone to double check my math as i am converting orders between accounts with different leverage amounts.
If you are worried about margin and leverage, you are not controlling your risk. Never risk more than a small percentage of your account, certainly less than 2% per trade, 6% total. In code (MT4): Risk depends on your initial stop loss, lot size, and the value of the pair.
  1. You place the stop where it needs to be - where the reason for the trade is no longer valid. E.g. trading a support bounce the stop goes below the support.
  2. AccountBalance * percent/100 = RISK = OrderLots * (|OrderOpenPrice - OrderStopLoss| * DeltaPerLot + CommissionPerLot) (Note OOP-OSL includes the spread, and DeltaPerLot is usually around $10/pip but it takes account of the exchange rates of the pair vs. your account currency.)
  3. Do NOT use TickValue by itself - DeltaPerLot and verify that MODE_TICKVALUE is returning a value in your deposit currency, as promised by the documentation, or whether it is returning a value in the instrument's base currency.
              MODE_TICKVALUE is not reliable on non-fx instruments with many brokers.
  4. You must normalize lots properly and check against min and max.
  5. You must also check FreeMargin to avoid stop out
Most pairs are worth about $10 per PIP. A $5 risk with a (very small) 5 PIP SL is $5/$10/5=0.1 Lots maximum.
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