RC2_FOR_TARGET

for loop target must be a simple variable name.

What it means

The loop variable has to be one plain name — for i in …, for k in …. RaamCode has no unpacking, so a tuple target has nothing to unpack into: there is no enumerate() to produce index/value pairs, and dict iteration yields keys, not pairs. One name, one value per pass.

Why it happens

Reaching for Python’s for k, v in … over a dict:

class Bad(Strategy):
    trade = Symbol()
    sizing = FixedCapital()
    counts = {"up": 0, "down": 0}
    total = 0.0

    def execute(self):
        for k, v in self.counts:            # ❌ tuple target
            self.total = self.total + 1.0

for i, x in enumerate(self.vals): fails here too — and enumerate is a blocked builtin on top of it.

How to fix it

Iterate the keys and look the value up. It is one extra subscript and it reads the same.

class Good(Strategy):
    trade = Symbol()
    sizing = FixedCapital()
    counts = {"up": 0, "down": 0, "doji": 0}
    total = 0.0

    def execute(self):
        self.total = 0.0
        for k in self.counts:                       # ✅ one name — the key
            self.total = self.total + self.counts[k]

        if self.total > 100 and self.trade.is_flat:
            self.buy(self.trade)

For a list, the index-and-element pair is range(...) plus a subscript:

class Indexed(Strategy):
    trade = Symbol()
    sizing = FixedCapital()
    recent_highs = [0.0]*5
    total = 0.0

    def execute(self):
        self.total = 0.0
        for i in range(5):                          # ✅ the index
            self.total = self.total + self.recent_highs[i]

        if self.total > 0 and self.trade.is_flat:
            self.buy(self.trade)

For Loops — the three loop shapes, in full.
RC2_FOR_ITER — the target is fine, the thing being iterated isn’t.
RC2_ASSIGN_LHS — the same “one name” rule for assignment.