Risk and Money Management

In scalping, things rarely go wrong in one obvious moment. A stop is placed a little late, a position is slightly too large, a losing trade is held because it might come back. None of these feels serious on its own. Across ten trades in a session, they decide the result.

Why small decisions add up

You are not taking one trade. You are taking several in the same session, so small decisions do not stay separate. A loss that should have been ₹1,500 becomes ₹3,000. The next trade is taken a little early to win it back. Then another. By the close, no single trade stands out, but the session is worse than it should have been.

Compare the two Nifty charts below. Both start from a similar idea and entry. The difference shows up once price moves against the position.

Fix your risk per trade

Every risk framework starts with one question: how much will you lose on this trade if it fails? Scalpers usually fix this as a percentage of total capital, typically 0.5% to 2% per trade.

This chapter uses 1%, or ₹2,000, for its examples. The number is set before the trade and stays the same from trade to trade. It does not change with your confidence, the market's mood, or your last win or loss.

What a losing streak does

Five losses in a row happen to every trader sooner or later. Here is what the same streak does at two risk levels, for illustration:

At 1%, the streak is an ordinary bad day. At 5%, a quarter of the account is gone, and you now need a one-third gain just to get back to where you started. A fixed, small risk keeps any one trade from damaging the account and gives your method enough trades to show whether it works.

Place the stop where the idea fails

Once the rupee risk is fixed, decide where the trade is wrong. The stop-loss is not a number chosen for comfort. It sits at the price where the reason for the trade no longer holds:

• Long trades: just below the support or swing low that the setup depends on.
• Short trades: just above the resistance or swing high.
• Range or consolidation setups: outside the structure that defines the setup.

A fixed rupee stop, such as ₹500 or ₹1,000 on every trade whatever the chart shows, causes two problems. If it is too tight, normal fluctuation takes you out before the idea has been tested. If it is too wide, the loss is larger than it needs to be. Price moves by structure, levels and liquidity, not by your rupee number.

A wider stop does not mean a bigger loss. You keep the rupee risk the same by trading fewer lots, which the next section shows.

Work out your position size

Position size is not chosen by margin, premium or instinct. It comes out of a short calculation, done before the trade.

A worked example on a Nifty option, with illustrative numbers. You buy at a premium of ₹120 and your stop is at ₹100.

Two lots would put ₹2,600 at risk, above the ₹2,000 limit. Rounding down keeps the trade inside the plan. The lot size of 65 is the Nifty 50 lot used in the original example; always check the current lot size on the contract before you trade.

The cheap-premium trap

An option at ₹10 feels cheaper than one at ₹100, so traders buy more lots of it. But the premium does not define the risk; the stop distance and the number of units do. Say you buy 10 lots of a ₹10 option because "it is cheap":

That is more than the whole ₹2,000 budget, from a ₹4 move. Size every trade with the formula, whatever the premium.

Win rate, reward-to-risk and costs

Scalping is built on small, repeated gains. That leaves little room for error, so check that your method can pay before costs, and then after them.

How often must you win?

The reward-to-risk ratio (R:R) compares what you aim to make with what you risk. At 1:2 you risk ₹1,000 to make ₹2,000. The higher your R:R, the fewer trades you need to win to break even.

Now ten trades at ₹1,000 risk and a ₹1,500 target (1:1.5), with about ₹30 of costs per trade. Round numbers, for illustration:

At exactly the break-even win rate, costs turn the session negative. You need an edge above break-even, not at it.

One trade handled differently

A few trades go to plan and small gains build. Then one trade is handled differently: the stop is not followed, or the position is held in the hope that it turns. For illustration, three trades at ₹1,000 risk:

This is how many sessions turn from slightly positive to negative. Take trades only when the setup's conditions are met, place the stop and follow it, exit at the target or when the trade becomes invalid, and do not hold a scalp in the hope of turning it into a larger move.

Costs on every round trip

In Indian options, every trade carries brokerage, STT, exchange charges, GST, stamp duty and the SEBI fee. For a scalper these repeat on every trade. Here is one illustrative round trip of 1 lot of Nifty options, assuming a flat ₹10 brokerage per order and about ₹2,500 of premium on each side:

About ₹30 a round trip looks small. On a ₹100 gross profit it is 30% of the gain. Across ten trades it is about ₹300 a session, which is exactly what turned the 40% session above from zero to a loss.

Charges are illustrative and change from time to time; check the current rates and SAHI's pricing before you rely on them. If your plan has lower or zero brokerage, the brokerage and its GST fall away and the total is lower.

The pre-market routine

Most execution mistakes during a session trace back to what was not decided before the open. By 09:15 you should already know where the key levels are, what kind of conditions to expect, and how much you are prepared to lose today. Then price reaching a level is something you marked earlier, not something you work out under pressure.

PDH and PDL are the previous day's high and low.

With this done, entries come at the level rather than after it, and there is less need to justify a trade after you have taken it. Without it, trades are built around whatever price is doing in the moment: entries are late, exits are uncertain, and small gains are hard to keep.

Daily limits and the Kill Switch

Risk per trade protects each trade. Two more limits protect the session. They are not precautions for bad days; they are what stop a bad day from becoming a bad week.

• Maximum number of trades. It prevents overtrading on days when setups are not clear. When the count is reached, the session ends, however the market looks.
• Daily loss limit (daily drawdown). The rupee loss at which you stop for the day. After a few losses in a row, the urge to win it back leads to impulsive trades that drift away from the plan.

A worked example with the numbers used in this chapter. The multiples are a common way to set the limit, not a rule; choose yours before the open:

The limit applies to the session's net P&L. If you are up ₹3,000 and then lose ₹5,000, the session is at −₹2,000, and that counts towards the ₹6,000 limit.

This is where SAHI's Kill Switch helps. Once your predefined loss limit is reached, it lets you disable trading in a selected segment for the rest of the day. The aim is simple: take the decision out of your hands at the moment you are least able to make it well, and prevent revenge trading and overtrading after losses.

In practice:

• Set a maximum number of trades and a daily loss limit in rupees before the open.
• Stop trading as soon as either limit is reached.
• Use the Kill Switch to enforce the limit, rather than relying on willpower.
• Never change either limit during the session.

Keep a trade journal

Once the session is over, the only way to know what actually happened is to review the trades. A trade journal is a simple record of each trade and how it was executed. It is one of the most effective ways to improve, and one of the first habits traders drop.

Most traders remember the profit or loss and forget the process. A journal moves the question from "Did I make money?" to "Did I execute the trade the way I planned?" Without a record, mistakes repeat, good practices go unnoticed and improvement is random. With one, patterns in your execution become clear, you see which setups actually work, and consistency builds.

One row per trade is enough. An illustrative entry:

Reviewed every session, the journal shows what you cannot see live: whether stops are followed or moved in the moment, which time windows suit you, and which setups behave differently in certain conditions. Keep it simple; consistency matters more than detail.

With risk fixed at the trade and session level, the structure is in place. What remains is when to act and what to look for. That is the next chapter: timing, candle patterns and chart structures.

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