SMC Extreme OB Reversal draws one sequence on MT4 and MT5: a trend that breaks structure two or three times, an extreme it cannot beat, a close back through the swings above it, and then the one order block that produced the whole thing.
It draws nothing else. Most days on most charts it draws nothing at all, and that's easier to accept once you have seen why.

The sequence it waits for
Left to right, for a buy. The sell model is the mirror.
| Label | What it is | Why it matters |
|---|---|---|
| A | the high the whole leg came from | this becomes the target, because that is where the resting orders are |
| B, D, F | lows the market closed through | each one is a break of structure, and the count is the strength reading |
| C, E, G | the lower highs between them | they keep the chain honest, and one of them will be the level that gets taken back |
| H | the extreme low | the end of the chain, and the root of what comes next |
| MSS | a close back above the swings left of H | the turn. Not a wick, not a touch, a close |
| EX OB | the block at the root of that rally | the entry zone, drawn only after the shift |
Three things in that order or nothing is drawn. Price breaks structure often, and it shifts structure often enough. What's rare is price coming all the way back to the root of the move before it goes.
I ran the engine across four symbols and two timeframes, sixteen charts, looking at the last 300 bars of each. Five of them had a model. That's the tool working correctly.
Where the popular versions drift
| What the material says | What most tools implement | What this does |
|---|---|---|
| A break needs a body close. A wick through and back is a sweep, which means the opposite thing | Wick and close treated the same, so every poke counts | Every break in the chain is read on the close |
| MSS means something only after liquidity has been taken | Any cross of the last swing gets an arrow | Read only at the extreme of a finished chain, and by default price must close through the last two swings |
| Two blocks in a leg matter: the decisional one and the extreme one. Everything between is a trap | Every opposite-coloured candle gets a box | One block per model, at the root |
| A zone price has traded through is finished | Zones sit there until they scroll off the left | The block dies on a close beyond its far edge, and the model dies with it |
The third row is the one that costs money, and it is the reason this looks empty next to a free order block tool. Walk down a real downtrend and you will pass four or five candles that qualify as bullish blocks. Price slices through every one of them before it reaches the one at the base. Marking all five is not analysis, it's a list.

What it draws, and what it doesn't
Chain labels A onwards, one dotted line per break of structure captioned BOSโ or BOS+, a solid MSS line from the swing that was taken to the bar that took it, the extreme block, a dashed TARGET line at point A, and once price returns into the block, an entry marker with a stop block in orange and a target block in cyan.
The stop sits outside the zone by a slice of ATR. The target sits inside point A by another one, so profit comes off before price has to break the old extreme. If that puts the target on the wrong side of the entry, the whole model is discarded rather than drawn as a trade with no room in it.
No fair value gaps, no liquidity pools, no killzone shading, no higher timeframe zones, and no buy or sell arrows anywhere in it.
Two ways to read structure, one dropdown
Pivot mode is the familiar one: a swing high is a bar higher than the N bars either side. Simple, and measured in bars, which is the problem. The same structure takes five bars in a fast market and twenty in a slow one.
BOS chain mode, the default, closes a swing when price retraces from it by a multiple of ATR. Nothing is counted in bars, so one setting travels between gold and the majors without being retuned. Both modes feed the same engine and both ship in the same file, so you can flip between them on one chart and see which one reads your symbol better.
The same model on both platforms

The MT4 build is not a rewrite with the same name. It's the same engine, and the picture above is the check: same symbol, same dates, same chain, same block, same entry as the MT5 chart further up. If the port had drifted, that's where it would show.
Both platforms are in your download. One licence covers them.
What it can't do
There's no higher timeframe awareness in it. A clean buy on H1 sitting under a daily supply zone looks exactly like one with clear air above it, and that part is yours.
One behaviour will look like repainting until you know what it is. Levels never move after a bar closes; everything is derived from closed bars and the shift is confirmed by a close. But a model whose block dies before price ever returns is removed from the chart entirely, because a setup that can no longer be taken is clutter. So models do disappear. They never move.
The ATR multiplier is the one setting you'll end up touching. 2.0 is a fair middle on gold and the majors; on a quiet cross it produces too few swings to build a chain from, and that's what pivot mode is there for.
You won't find a win rate table on this page, and I'd be careful with any indicator page that has one. The panel does keep a tally of the models it drew in your loaded history, with its own stop and target, no spread and no slippage. Read it as a count of setups, not as a result.
Questions you'll have
Does SMC Extreme OB Reversal repaint? No on closed bars. Swings are only committed once price has moved away far enough to confirm them, breaks and the structure shift are confirmed by a close, and nothing already drawn moves afterwards. Models can be removed when their block dies, which is not the same thing.
Why does it show so few signals? Because the pullback all the way to the extreme block is the rare part. If you want more of them, drop the confirmation from MSS to CHoCH so one closed swing is enough, or lower the minimum number of breaks in the chain from two to one.
What timeframes work best? H1 and H4. It runs on M15, but the chains get short and the ATR offsets start eating a bigger share of a smaller move.
Does it work on gold? Yes, and gold is where the default 2.0 ATR setting was tuned. The screenshots above are XAUUSD and USDJPY on H4.
MT4? Both platforms are included, same logic, one download each.
Do I get alerts? Yes, on the waiting setup rather than the finished model, because by the time the last point confirms the entry is gone. Either the moment price trades into the block or on bar close only, one alert per bar per direction, and it stays silent about history when you first attach it.
Analysis tool. It places no trades and makes no profitability claim. Past price behaviour is not a guide to future price behaviour.