It starts with a board you already know
04.04.03 gave you the inside bar: a session whose entire range sits within the session before it. High lower, low higher, the whole argument contained. On its own it says only that the market did less than it had just done.
Hikkake begins there and adds what happens next. The word is Japanese for a trap or a hook, and the sequence describes one.
Monday runs ₹29.40 to ₹30.80. Tuesday sits inside it, ₹29.70 to ₹30.40. On Wednesday the price breaks below Tuesday's low — down to ₹29.50 — which looks like the inside bar resolving downward. Then it does not continue. By Friday the bidding has come back and closed at ₹30.55, above Tuesday's high.
The downside break did not hold. Anyone who acted on it is now on the wrong side of the range they broke out of.
The break that did not hold
Two numbers carry the whole pattern: Tuesday's low at ₹29.70, and Tuesday's high at ₹30.40. Watch what Wednesday and Friday do to each of them.
Granthara's rules engine returns no pattern here, because it has no hikkake rule — but every condition above is a number against a number, so you can check it by eye in seconds.
Four lines, and why that matters
Write the definition out and it is startlingly plain:
One. A session sits entirely inside the one before it. Two. A later session breaks one side of that inside range. Three. The break is not extended. Four. Within a few sessions, price closes through the other side of the inside range.
There is no long shadow, no small body, no strong trend. Every term is a price compared with another price, and the only convention is how many sessions you allow for step four — commonly three.
Compare that with a hammer, which needs a shadow to be long relative to a body, relative to recent boards, after a decline that somebody has to judge. The hammer needs an opinion before it can be identified. This does not.
A pattern you can state without adjectives is a pattern somebody can prove wrong.
The modified version, and what it adds
The modified hikkake keeps the four conditions and adds a fifth about where the sequence happens: the inside bar must arrive in a particular context — after a run in one direction, rather than in the middle of a range.
That is the same move 04.03.02 made with the hammer. Take a shape that means little by itself, and require the sessions around it to say something before you attach a name.
It also imports the same weakness. The four original conditions are checkable by anyone; after a run in one direction is a judgement again, and two people will disagree about it. The modified version is more selective and less mechanical, and you should know which of those two you are trading.
What the five boards permit
They permit you to say that a contained session was broken on one side, that the break did not extend, and that price then closed through the opposite side within the week. All four are readable off the boards.
They do not permit you to say anyone was trapped. It is a vivid word and this book will not use it as a fact: the boards record prices, not the positions or the regrets of the people behind them. Chapter 04.06 returns to that distinction properly.
And they do not permit a direction for next week. That this one is precisely defined makes it testable, not correct — those are different properties, and confusing them is how a well-specified rule acquires an unearned reputation.