The traps to avoid

The last chapter showed how an account blows up. This one names the specific choices that lead there, because the blow-up is never really a single event; it is the end of a chain of ordinary mistakes. The encouraging part is that the list is short and every item has a plain guardrail. None of this is advanced. It is the difference between the traders who survive long enough to get good and the ones who do not.

Over-sizing, the master mistake

Every other mistake is smaller than this one. Over-sizing means taking a position too large for your capital, usually by treating the small margin as the size of the bet. A trader with two lakh sees that one NIFTY lot needs about one lakh fifty-six thousand of margin and takes it, feeling fully invested, without registering that they now control fifteen lakh sixty thousand of index and that a 3% move is a 23% swing in their account.

The guardrail is to size by the contract value and by what an adverse move does to your capital, never by the margin. Ask a simple question before entering: if the underlying moves 3% or 5% against me, an ordinary move, what does that do to my account? If the answer frightens you, the position is too big. Use far less than the maximum leverage the margin allows, so that a routine bad day is survivable.

No exit decided before entry

Many traders enter a future with a clear idea of the profit they hope for and no idea of the loss they will accept. When the trade goes against them, they have no plan, so they freeze, and daily settlement bleeds them while they hope.

The guardrail is to decide your exit, both the profit target and the maximum loss, before you enter, when you are calm. A stop-loss order can enforce the loss side during market hours, as long as you remember from the last chapter that a gap jumps straight past it. A planned exit is not a prediction; it is a promise you make to yourself while you can still think clearly.

Averaging down a leveraged loser

In the cash market, buying more of a falling share to lower your average price is a debatable but survivable habit. In leveraged futures it is dangerous, because you are doubling a position that is already bleeding cash daily and already threatening your margin. Adding to a losing future to "average down" enlarges the very bet that is hurting you, and brings the margin call closer, not further.

The guardrail is simple: never average down a leveraged loser. If the trade has gone against your plan, cut it or hold your original size, but do not feed it. Adding to winners, not losers, is the healthier instinct if you must scale at all.

Running at bare margin, with no buffer

An account funded with only the margin the position requires has no room to breathe. As you saw, a single ordinary down day can then pull the balance below the requirement and trigger a margin call, forcing you out of a position that might have been fine given room.

The guardrail is a generous cash buffer. Keep well more in the account than the position strictly needs, so that ordinary losing days draw down the buffer rather than breaching the margin. The buffer is not idle or wasted; it is precisely what lets you hold a sound position through the noise instead of being shaken out at the worst moment.

Holding a single-stock future into expiry

A trader comfortable with the cash-settled index forgets that a single-stock future is physically settled, holds it to expiry, and is suddenly facing delivery of the actual shares worth the full contract value, or a scramble as the broker raises margins and squares them off.

The guardrail is to close or roll single-stock futures before expiry, unless you genuinely intend and can afford delivery. Index futures you may carry to expiry safely; stock futures you should not, unless delivery is the plan.

Letting a loss drive the next trade

The final mistake is not mechanical but human. After a painful loss, the urge to win it straight back leads to a bigger, hastier trade, revenge trading, and leverage makes that tilt expensive in a way the cash market does not. A single emotional, over-sized futures trade can undo weeks of discipline.

The guardrail is to step away after a bad loss rather than trade through the emotion. The leverage that punishes a mis-sized position punishes a mis-timed, angry one just as hard. Discipline, more than any indicator, is the edge here, which is exactly why the next course is devoted to it.

What to carry forward

The common futures mistakes are few and avoidable: over-sizing above all, then entering with no planned exit, averaging down a leveraged loser, running with no cash buffer, holding a single-stock future into delivery, and letting a loss drive the next trade. Each has a plain guardrail, and nearly all of them come back to one control, position size, judged against the real contract value and an ordinary adverse move, not the deceptively small margin. Keep the size right and the buffer real, and most of the ways to lose are closed off. The final chapter gathers the whole course into a pre-trade checklist and walks you into the practice sandbox to rehearse before any real money is involved.