RC2_STATE_SYMBOL_CLASH

Persistent state name <name> collides with a Symbol declared in the class body.

What it means

A persistent state variable (self.x = ... inside execute()) cannot share a name with a Symbol() slot. If trade = Symbol() is in the class body, you can’t later do self.trade = 100.

The reason: self.trade already means “the trading symbol slot.” Assigning a value to it would shadow the slot and break access to OHLCV and position helpers.

Why it happens

class Bad(Strategy):
    trade = Symbol()         # declares self.trade as the symbol slot
    sizing = FixedQuantity()

    def execute(self):
        self.trade = 100     # ❌ — collides with the Symbol name

How to fix it

Rename either the Symbol or the state variable. Common renames:

class Good(Strategy):
    trade = Symbol()             # keep the Symbol name
    sizing = FixedQuantity()

    def execute(self):
        self.trade_count = 100   # ✅ different name

Or reframe — if you wanted to track an entry price or count wins, a more descriptive name doesn’t collide in the first place:

self.last_entry_price = self.trade.close
self.win_count = self.win_count + 1

RC2_STATE_PARAM_CLASH — same idea for Param names.
RC2_STATE_RESERVED — state name shadows a reserved strategy property (capital, bar_count, etc.).