3Commas 'TRX Grid Long Strategy' faithful port: fixed-bound geometric long grid on TRXUSDT.BYBIT 15m (0.2660-0.3713, 35 levels, equity/35 per slot, no stop)

Faithful translation of the open-source TradingView Pine v6 script 'TRX Grid Long Strategy [3Commas]' by 3Commas (https://www.tradingview.com/script/tgRchEEL-TRX-Grid-Long-Strategy-3Commas/, MPL-2.0; credit to 3Commas). The author calibrated it for BYBIT:TRXUSDT.P on 15m, so it runs on our TRXUSDT.BYBIT linear perpetual, 15-MINUTE bars (catalog TRXUSDT.BYBIT-15-MINUTE-LAST-EXTERNAL covers 2021-08-31 to 2026-09-30). It is a long-only price grid between FIXED ABSOLUTE bounds high_price=0.3713 and low_price=0.2660, with n_levels=35 levels. Level i (i=0..n_levels-1) is at pct=i/(n_levels-1). Geometric mode (the default) puts it at high_price*(low_price/high_price)^pct. Arithmetic mode puts it at high_price-(high_price-low_price)*pct. Level 0 is the top (0.3713) and level 34 is the bottom (0.2660). Geometric step = (0.2660/0.3713)^(1/34) - 1, about -0.98% per level. Each level i in 1..34 is a 'slot' with an owned flag (all false at start). Every bar, for i=1..n_levels-1 in ascending order: BUY slot i if it is not owned, prev_close > level_i and close <= level_i. SELL (close slot i) if it was owned at the start of that iteration, prev_close < level_{i-1} and close >= level_{i-1}. Slot size is investment/n_levels USDT, converted to quantity at the LEVEL price (qty = usdt_per_level/level_i, not the fill price). Source default: 10,000 USDT of 10,000 capital = 286 USDT per slot. Ported: investment = 100% of starting equity ($100,000), so each slot is 100000/35 = $2,857 notional at 1x leverage. Pyramiding up to 200 entries is allowed, so many slots can be open at once. There is NO stop-loss, NO trailing and NO take-profit other than the next-level-up sell, by the author's explicit design. Orders fill at the bar close (process_orders_on_close=true, calc_on_every_tick=false). Port note on the date window: the source's useDateFilter (2025-08-13 to 2026-06-22) is a TradingView backtest-range control, not a trading rule. Keeping it would make the strategy dead outside a past window and in live trading, so it is NOT ported, which is equivalent to useDateFilter=false. All visualization, labels, tables, watermark and 3Commas webhook alert strings are display or ops code and are not ported. HONEST PRIOR: this belongs to the inventory-grid family that lesson L171 records as 5 of 5 dead. A sibling 3Commas FIL Bybit geometric grid is already in the pipeline. The fixed bounds are hindsight-calibrated to TRX's 2025-26 range. TRX traded below 0.266 from 2021 until about Dec 2024. Until price first rises above levels and then crosses back down, NO slot can be bought. The effectively active history is therefore about Dec 2024 to Sep 2026 (roughly 22 months), and the earlier years produce zero trades.