RC2_STATE_RESERVED

<name> is a strategy-level reserved property; it cannot be used as persistent state.

What it means

Four names are strategy-level properties the platform computes and hands you every bar:

Property	What it is
self.capital	Current equity.
self.initial_capital	The equity the run started with.
self.bar_count	Bars seen so far, 1-based.
self.ready	Whether every declared indicator has finished warming up.

They are read-only. Declaring persistent state under one of those names — in the class body or by assigning to it in execute() — would shadow the real property, and every later read would silently return your value instead of the platform’s.

Why it happens

class Bad(Strategy):
    trade = Symbol()
    sizing = FixedCapital()
    bar_count = 0        # ❌ shadows the platform's bar counter

    def execute(self):
        if self.trade.is_flat:
            self.buy(self.trade)

The same refusal fires for an assignment inside execute() — self.capital = 100000 is not a way to set your starting equity.

How to fix it

Rename your slot. The reserved property stays readable alongside it.

class Good(Strategy):
    trade = Symbol()
    sizing = FixedCapital()
    my_bar_count = 0        # ✅ a name of your own

    def execute(self):
        self.my_bar_count += 1

        # the platform's own counter is still readable
        if self.bar_count > 20 and self.trade.is_flat:
            self.buy(self.trade, reason=f"equity {self.capital:.0f}")

Starting capital is a run setting, not a strategy value — it is chosen on the backtest or deploy form, and self.initial_capital reports it back to you.

Related

• Strategy Properties
• Persistent State
• RC2_PARAM_RESERVED — the same collision, from a Param() instead.
• RC2_STATE_PARAM_CLASH / RC2_STATE_SYMBOL_CLASH — state colliding with your own Param or Symbol names.