The worked example
Take two mirrored leaders with genuinely different views, which is the whole point of holding both.
- Leader A opens long 2 BTC. Your account is long 2 BTC.
- Leader B opens short 1.5 BTC. In a single account you are now long 0.5 BTC.
- Leader A closes for a gain — your remaining exposure flips to short 1.5 BTC even though nothing changed in leader B's book.
- You paid taker fees and the builder fee on 3.5 BTC of notional to end up with 0.5 BTC of exposure that neither leader chose.