How to calculate Trade Size in Perp

[quoctran1]

I want to calculate Max trade size in Perp. This is my step:

1. Get leverage:

 const user = driftClient.getUser();
 const maxLeveragePerp = user.getMaxLeverageForPerp(perpMarketIndex);

2. Get wallet balance
3. I used this logic to get max trade size: (maxLeveragePerp * wallet balance)/ token price
   Ex:

• maxLeveragePerp of SOL= 13.15
• wallet balance = 100$
• token price of SOL = 243
  =>( 13.15 *100)/243=5.4115226337
  It cant be 7.05 in the image above.