is lot size matter in your loss and profit??

G han ap ki bat bilkul theek hay aur may is se agree karti hun k humay teading karty waqt apna lot size boht munasib rakhna cahiay zada ki lalach bilkul nai karni cahiay agar hum lot size zada rakhe gay tou hum loss bhi zada utha sakte hay bas humay munasib profit hSil karna cahiay